Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dcf930b36df7c8…

MALICIOUS

PDF

78.5 KB Created: 2021-04-01 00:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 632aef7fb972a112dacf045ce959dac3 SHA-1: eb1baac8d1cbe7dbdf0bed52ab768fe132e61e6b SHA-256: 76dcf930b36df7c8c7cbbb9afa3175fab0d03d4716da6c8239c32a85987512c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/award?keyword=alliteration+assonance+consonance+onomatopoeia+worksheets+pdf PDF link annotation
    • http://ledabojuvogo.22web.org/carotid_doppler_report.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/firofokelilufixoku.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/ridigefozal_zotek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5fdfa62e312d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_604ae9559c20c.pdfIn PDF document text
    • https://xemefotiri.weebly.com/uploads/1/3/4/6/134614789/pewawowegemesis.pdfIn PDF document text
    • https://deluneruniji.weebly.com/uploads/1/3/4/0/134012649/tolaliwikemukaruz.pdfIn PDF document text
    • https://sonadenazutimiw.weebly.com/uploads/1/3/4/6/134654654/vakizebedemawuxufoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/piradi/how_to_bypass_liftmaster_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/48677360248.pdfIn PDF document text
    • http://tirawuko.rf.gd/jegen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fa53d8-e6fb-41c0-8965-58c017d38501/15049342581.pdfIn PDF document text
    • http://bananamiw.rf.gd/24280264897.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/2226241732.pdfIn PDF document text
    • http://lanirir.epizy.com/action_research_project_for_b._ed_students_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5638a8e0-a566-4053-b0e8-96808507ae23/how_to_set_up_mainstays_tension_pole_shower_caddy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33e303a-4057-4f53-a0de-957b577eda03/74138607918.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/67424141950.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/mothercare_jumperoo_weight_limit.pdfIn PDF document text
    • http://kowotasube.epizy.com/geometric_construction_drawings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83885f5e-edfa-4740-8e7e-5b5d9aac881d/pizuxabikixezef.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_off0000f55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55B 5540 bytes
SHA-256: e21492b3ee17084b4c43e3f5e32704afbf0aeb07ef334ed0cfb8e0790b21813a
font_01_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 10480 bytes
SHA-256: e86d461fd0d6f2d7d8490228ed1d4273c5e08c4a6ec1e17ec3cf02e14c57b1db

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