Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdefde8b6a94ac2…

MALICIOUS

PDF

89.5 KB Created: 2021-08-04 15:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b7d11f9338392c8cb14946c432297e35 SHA-1: a287383da4a2252af6727aaa6bdb395e114f5328 SHA-256: 3bdefde8b6a94ac2d5e35b4461f366f4cb6daeb2173a1ff462f8091a6689de13
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, likely to host or redirect to a malicious payload. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest an attempt to distribute malware through deceptive links, potentially disguised as a download for 'mod for minecraft pe pc'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://aeronautike.com/userfiles/file/35623597927.pdf In PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/78stmr5osnpn46sm4roc5rgtpr/jajujiwoferidurixu.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/58913853487.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/95155498840.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/o2fkb78vjsugengfpnli8vh728/95567864608.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/bejapopipudutemupuzekoja.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/lasupenaw.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/kazuper.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074168d5cb36---14982547035.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f787a21a6fc---sazexeb.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/miranu.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/72472578390.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6t1gf369hd3fskiqdl26fpjjnh/74233638443.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/92018258030.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c3dc8992b---25020568018.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/pibubimikoxavelunu.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/letifavarimo.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/84802758818.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/63943202229.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/fhglolu2rjg5gu91fhmpkv7mvp/79511313851.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/bfc4cf52be57f9816cfd7af1cac75f93/70436980883.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/957106285.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8709f6472f---jobekedemabixetoja.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b7db16f58---60994548755.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/tofodu.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///lizajegosu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=mod+for+minecraft+pe+pcPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 10560 bytes
SHA-256: bff0d8a3e53af42ad3d48de78c9b9424bc87e5eae6ae3e6a6d0708ad27ff725b
font_02_sfnt_off00012a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5F 17468 bytes
SHA-256: 4e6989820220192e7d96643529d4251f11b6bcfd455d8ba5d1303618108e84f4