Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f22ebeeaeaedc90…

MALICIOUS

PDF

73.9 KB Created: 2021-08-09 05:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa0eec52bc1e0e006797577cf32f4cb5 SHA-1: f155c1c68dfdedf561d2725a84bb46b4dc920626 SHA-256: 5f22ebeeaeaedc90dc380243584bce0847458f2ee25a606f653ebfac0e216936
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://archism.ru/uplcv?utm_term=how+to+fix+gta+v+pc+no+sound PDF link annotation
    • http://futureinfashion.com/ckfinder/userfiles/files/jotamupukutavuripam.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/tozezis.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/lotajinidixawiriparowaj.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa7589ccbd---81974307261.pdfIn PDF document text
    • http://herve-coiffure.ci/files/rexopumuvilozotobolefisa.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/84065622418.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/af79b8c5f481a75898d36783df8b57ad/tatuzibogapadebaponi.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/78352439085.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/3108b9464d22f2f612b15b2c3e15b195/duxujojuwebaxejul.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8623dcfbe6---44322910696.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754c10dc12f---4863472012.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/valovasajo.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c19855020---31759337528.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6bc5b024e---tumese.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/giwuweboriteralegasono.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/fasuvax.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/radexutupede.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/83700166096.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/derorakupolimidilowekap.pdfIn PDF document text
    • https://stopserv.ru/files/file/nilivogosutu.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/pmaq6j94vmrile74hba9fkj773/68043804049.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/kelexapevet.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d712e8e57a---86797146645.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_off0000bd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD01 16468 bytes
SHA-256: 461bb7df71f950fef4c225c3cac5f343be95017a8542276c0227b488a4049562
font_01_sfnt_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 10864 bytes
SHA-256: 1b6d3e4426cafd53f98068d90c5f0470a6b67901e3ab3d501a6211ba598d165c

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