Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd14d2ff45c71810…

MALICIOUS

PDF

75.2 KB Created: 2021-09-02 16:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 744e1fa13859c2ea982e71004fa05619 SHA-1: 777aab0631a915f9587dbe0e9d679d8592debcea SHA-256: dd14d2ff45c718106c1360d98d6b4d74d572d64db8521de276e1c48fc30585f6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS upload directories and disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious content, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://allegypttours.net/userfiles/files/xuvowirodezarariz.pdf In PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/04761fed9f3312260abdb72dfda16d81/28711029966.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/musemu.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/16195319849.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/10405831264.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0fd6c4a0b---97775940125.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/gomozedogemuziredov.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/13b71e26a9be9604561ba4b6990c1b17/fenabanezutilixazulevofe.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098455123679---47897237311.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/2c3c90c2734698b4bad4e4e7627cdf7d/wigotuwozet.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608684c8de921---34055488845.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160852de6e124c---ximirekumamugugomi.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/84963314686.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/94085180090.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/vuvadenurulu.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/begodaza.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/61665970806.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210805010323.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/ferajasol.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/e0d07b21e0261b839afa67432c779cf3/jugofodoputaz.pdfIn PDF document text
    • http://allycatering.com/userfiles/xalutesunemamajimetusaw.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/52006060476.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/kusivofaxesubebisupixe.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/2d2b3089ed4b0176daf102a8d319e18a/noraz.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/65558076113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=best+manual+car+wash+in+dubaiPDF 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_off0000c3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 10896 bytes
SHA-256: 2836f9e7e92868f32a25c2eef7edb9ade9d618dd93c6e298066e393b9c2ed5cb
font_02_sfnt_off0000f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EF 16556 bytes
SHA-256: 92df8cc7756f163ea453451d9c7a8d41f1b04080556dfebaa92dc0b22dd6181a