Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e01b6374a3a52ad…

MALICIOUS

PDF

73.4 KB Created: 2021-01-17 13:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3461f29d1dd733e6554dcd653ae8d6eb SHA-1: 3a4af9444f0020d7f6c5dc87a6748243ff0d42df SHA-256: 8e01b6374a3a52ad927450b551fdc82d97a8a75446373201b1886039b1aa9317
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://trafficel.ru/aws?utm_term=chitrali+audio+songs+free PDF link annotation
    • https://cdn.sqhk.co/bixatavafut/hhkjg7o/mejalokixes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417824/normal_5fa8d636187f0.pdfIn PDF document text
    • https://cdn.sqhk.co/wireriduwude/LKPibGr/ribik.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/gfiege9/occupational_therapy_jobs_nj.pdfIn PDF document text
    • https://nolalitikobuno.weebly.com/uploads/1/3/4/7/134768790/lupir.pdfIn PDF document text
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/ae392.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/7qkjjoR/44288210981.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/IghpzvG/viridiana_martinez_gonzalez.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/2718d158304b9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f91e8c93a4c5.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/hgfggqF/rujibafovuwadoluto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5fb8166443b9d.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/1symsuw/14627605293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xapota/facebook_app_for_android_5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/insects_coloring_sheets_for_preschoolers.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/kexifilulopezin.pdfIn PDF document text
    • http://notavopanugatog.epizy.com/marketing_mix_plan_template.pdfIn PDF document text
    • http://sewasijibakel.epizy.com/canon_in_d_classical_guitar_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/23336713707.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/20591519426.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 5072 bytes
SHA-256: 8e1baca531b97e5c976e9e22c060de847b1c41ba365adb9796300cbf1589aeed
font_01_sfnt_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 10752 bytes
SHA-256: 0c039160ffbc8365d71916a2493d469b9d2b2c95064db3666cfc677ec0c6e4b6
font_02_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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