Malicious PDF — malware analysis report

Static analysis result for SHA-256 350f56690b873fad…

MALICIOUS

PDF

88.1 KB Created: 2021-09-07 00:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 37b8a751e7bd338a8ed721fc2b91d1d8 SHA-1: 4e357b1f4a8627ed8182d453cac4f61ba8b7bd6d SHA-256: 350f56690b873fadd5099a87fe68a85a185f1a3b3707cb52ec0a6989f1819cdc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to various websites. Several of these URLs are hosted on compromised WordPress upload directories or on domains identified as disposable, suggesting an intent to distribute malicious content or conduct phishing operations. The document body is unreadable, but the presence of many external links is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://textingrights.com/userfiles/files/99228037850.pdf In PDF document text
    • http://bluecars.pl/userfiles/file/xubawurubupixexusitido.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/94310045425.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/6774430968.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/xavebewabowoman.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/p8n0ahibni5ee7kj2958au8o0a/19667398064.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/48973600979.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4707eb90b3---bemilixivepezufamageg.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/17877985505.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/68286819211.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/wariwaveziku.pdfIn PDF document text
    • http://htwy.com/upload/file/73606864308.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131b67993708---32734413302.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/60547854355.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/golisejizikuwa.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/fomaji.pdfIn PDF document text
    • http://rilta.net/userfiles/files/noxozotinamodilopipuxoz.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ef62eb3a1---mixufesonarefogo.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/vd2lg1shbu477r2fsinrcp34po/99770191808.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/kepuwadupubopemifu.pdfIn PDF document text
    • http://www.klccpa.com/userfiles/file/In PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/xevimobajafebo.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160720b0dc4c7d---zuzuvum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=unified+building+bye+laws+delhi+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF522 17060 bytes
SHA-256: 62ed94108719c9b95bda4210479cdb05dfe5efb53dbd7c398b11b9d11d0a5e6d
font_01_sfnt_off000121ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C2 10908 bytes
SHA-256: 130055b2ebfd9843f3d89ca7aef4dff5ac505b9b95fa6ec97e1d304a121072c3

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