Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dd4d95c40c6e04…

MALICIOUS

PDF

82.1 KB Created: 2021-09-20 05:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 72cb4f0a45fb821fc136abe48c4f81d8 SHA-1: 6514b99cee3fb3424f7eb9555255b842c410f184 SHA-256: 75dd4d95c40c6e04a8318692b320b844b742a9c8f69f5319c04043054715505c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm and embeds multiple URLs, many of which point to compromised websites or disposable hosting, suggesting an attempt to distribute malicious content or redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, consistent with callback phishing or tech-support scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://medvor.ru/uplcv?utm_term=gta+5+cheats+pc+story+mode PDF link annotation
    • http://flightshop.jp/images/blog/file/67477712254.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/61102285122.pdfIn PDF document text
    • https://dacola.com/upload/files/11820617964.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/4776968889.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/10d0e7e6a74376a68c53db74bae56758/fobagaminin.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/mamova.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/29545140824.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/vamut.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/sumexetegotamabit.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/35383858617.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/96003446559.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/46129251282.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/jafozu.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/majov.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/82046651384.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7a0b90bac5bc013bea81557f64b05015/25092371411.pdfIn PDF document text
    • https://esvigo.com/upload/files/zeduxutefawabidu.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/tazuvorejovegugemulesatir.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141bc175fe85---vepogexekewawoteze.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/57056473230.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/roxixiseweluzewupiligoz.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/57435452700.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/97155770671.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210903_E0D2E72364AE3340.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/56879368660.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 10824 bytes
SHA-256: bb9d7d16dbe1a86e737e9f2f41dab32f1de98dfd033620f64cabf4f478a8baf0
font_01_sfnt_off0000f2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 17892 bytes
SHA-256: e898ceb21a3918668110f9197d237d00d16b20851944685e8351ee18b46c0342
font_02_sfnt_off00012146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12146 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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