Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f972db2ca81dcc0…

MALICIOUS

PDF

73.2 KB Created: 2021-04-29 21:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0168a32a5b6d684042fb8b77fe901efb SHA-1: ef9245485b63fe30c7189e71c03a88ec6283b915 SHA-256: 5f972db2ca81dcc07d7508f1a25850f9dbb4dc374e40d47ab1edc9b35f3c1b62
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or redirecting to phishing sites. The document body, though heavily obfuscated, contains references to 'Football manager 2020 mobile advice' and the wkhtmltopdf tool, indicating a lure to attract users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=football+manager+2020+mobile+advice PDF link annotation
    • http://pizuwujigajanen.medianewsonline.com/68092372046.pdfIn PDF document text
    • http://werojati.getenjoyment.net/12080481451.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/sakopijapubelusoxuned.pdfIn PDF document text
    • https://radolawijukigi.weebly.com/uploads/1/3/5/9/135992833/295e83cb69ae.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/hjjlbji/89692667627.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/hfgexic/bbc_learn_spanish_with_free_online_lessons.pdfIn PDF document text
    • https://kexanitafax.weebly.com/uploads/1/3/0/8/130813084/c62e20949e.pdfIn PDF document text
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/79a99de86.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jhihIXj/ultimate_car_driving_simulator_apk_download.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/1623938.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/ujdjaje/98643984476.pdfIn PDF document text
    • https://jabudebixeref.weebly.com/uploads/1/3/4/3/134398441/kakizileso.pdfIn PDF document text
    • https://turumokapitaka.weebly.com/uploads/1/3/4/6/134613572/xewagaxuxigupil.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/btXjca3/vofugakudu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426679/normal_5fed7a0039c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_60584723cdfb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilaxeputeso.epizy.com/thoracic_spine_stretches.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/20865515710.pdfIn PDF document text
    • http://liforese.epizy.com/lexuwidovupodo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF51 5508 bytes
SHA-256: 1641af25e8fee1db5a16ed2d21b15dc14785baa318dbcf7e97a2a27baaa24877
font_01_sfnt_off0000f202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF202 11096 bytes
SHA-256: be6bcfae6f05271b49ed3b9c1e87b9de11ab2f14e496c82f143db88188c03453

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