Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbaee73a1be74dd2…

MALICIOUS

PDF

77.3 KB Created: 2021-02-15 12:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 97a308005447e4afcadff8e96150a0f8 SHA-1: 5e760b61ea0ac523fcb05e239c7ab724d6a37293 SHA-256: dbaee73a1be74dd249644f573bfdfc113067d4a863e7188256f067a9a17b6b18
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt, with one prominent URL pointing to 'bologen.ru'. The 'SE_CALLBACK_LURE' heuristic suggests it may also be used in callback phishing or tech-support scams. No scripts were extracted, but the PDF structure itself is leveraged for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/strik?utm_term=samsung+tv+software+update+2021+download PDF link annotation
    • https://gebuzikiko.weebly.com/uploads/1/3/5/4/135400935/7a3c33b3e.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/dezewe.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/9pNiigj/screen_recorder_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/Zig9hfo/xapulukuzibowugukasizago.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/dgdeYha/daxizoge.pdfIn PDF document text
    • http://fasad-dom.site/russian_classic_car_simulator_apkpure61xsj.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/fofamemin-nujovikidusise-bizebosaberatuw.pdfIn PDF document text
    • http://reform-st.ru/94554108817vixwd.pdfIn PDF document text
    • https://cdn.sqhk.co/fovudadeweto/eIRigG9/34134587410.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/ggqgjjs/smartphone_tycoon_2_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bewidiri.rf.gd/17809548820.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/rofaluko.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/bipozosukotanamuvugu.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/92644826435.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/film_american_pie_6_subtitle_indonesia.pdfIn PDF document text
    • http://lenamopotinapar.epizy.com/92885212627.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/4883799493.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_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 5944 bytes
SHA-256: fa0efe72f0d572556aae116b51571e593f0408faa59942a1171b006004b938a6
font_01_sfnt_off00010240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10240 11036 bytes
SHA-256: df75d7a2d12307a5c6770bcdd37e32ea417ad78af398bd36d3f707387aaedec6

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