Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ed9c7327451f20…

MALICIOUS

PDF

94.1 KB Created: 2021-06-28 19:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 00e97921aff34fb71e0eda755e4a39dd SHA-1: 41c9f7e1eff2aa0fe73873f243a9c66424961639 SHA-256: 04ed9c7327451f20c5dae1837f83cc67eff0c5934cc93aeaa726964cd8f8e608
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, many of which host further PDF files, suggesting a multi-stage download or phishing campaign. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=cc+for+sims+4+black+sims PDF link annotation
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609d829b75155---sofufugabekevup.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd70dbdd5b---kemesimobote.pdfIn PDF document text
    • https://invest.pl/userfiles/file/58101573676.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a87dde2469c---37807480446.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24d6c19e1a---rowawesorinaxam.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e5f215f2c---kalijepizitinipesadozawal.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ca5de8e3b---98088467573.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/9bfaf4546736cd07cde2c3ad53d19494/jogabusexejiwebuv.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/80b75354218df2a248e3553fd614e570/13538629543.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/1e075b5a3e8bffeecb869acead00c299/lesavetitod.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/1upthoasdtmmjvjpflehdv21fa/jazejesagokiraxi.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/c5697c3f315077d44eb37260603f2550/38944544934.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/bixitaviduvozogolope.pdfIn PDF document text
    • https://jurad.eu/files/file/97992196322.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8367d9dcb9---jaworapulopen.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/dodajixuvamojutunizonu.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/kugabimurasiziberivutup.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/wijakutedax.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebbdb5c5a2---18317362441.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb1e082fe4---99321081909.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/222f4c8d0428e8a7272217f154e9c097/85930148731.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4684c61beb---93428312809.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aab1da4e5---3687268881.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/riq4er8a72ngh2ff13u980eb7l/20650718687.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b58e0fc5c---24623360064.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 18572 bytes
SHA-256: 1e8cdea95b995abc9167d98d2e5171f9f058f68a7589ad5feb0e2547399d91b5
font_01_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 10504 bytes
SHA-256: bc16a67ea2e2415871ed934937551ca3d72913d9beb005f52c31c31a36726ae6
font_02_sfnt_off00013d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3A 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_03_sfnt_off000152b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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