Malicious PDF — malware analysis report

Static analysis result for SHA-256 616c7aacb3e35da6…

MALICIOUS

PDF

74.7 KB Created: 2021-03-12 11:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b69bf66f483011c516b718028f4e39c1 SHA-1: 9ba08d7e4de1776b281c071d894af14a780aade5 SHA-256: 616c7aacb3e35da69d7cfa55ec445d6768d0d79cb3c5c43e7590088daf6360c2
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://crophysi.ru/wix?keyword=turtle+trigger+unblocked+hacked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5feea4dbe7b20.pdfIn PDF document text
    • http://grigolia-studio.ru/65175732811e7c4m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410027/normal_60249d63276f2.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/jxwBqia/60293159071.pdfIn PDF document text
    • http://mihetos.xyz/zamalosillwpr8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491157/normal_601ffc983883f.pdfIn PDF document text
    • http://wordsidepost.top/762543145485ozzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5ff3fa393bd5a.pdfIn PDF document text
    • http://theporte.xyz/828473077610oysy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_60307f80eafd1.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/jd2zjf7/caribbean_cruise_deals_november_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_6023059f2dfdc.pdfIn PDF document text
    • https://cdn.sqhk.co/wenudiwome/gQ1hgm3/50988681456.pdfIn PDF document text
    • http://opencabinets.xyz/bolens_tractor_parts_lookup3m8yj.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/TFgdigt/lemajotuvo.pdfIn PDF document text
    • https://cdn.sqhk.co/nikajovefer/evhhLjd/spider_solitaire_247_halloween.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_602ce4d99d607.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/simujix/6234610261.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/jomuzixefa.pdfIn PDF document text
    • http://povusesa.rf.gd/96384854656.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/2008_dodge_caravan_overheating_issues.pdfIn PDF document text
    • http://jewuvebasabam.rf.gd/bupimabelevasopox.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_off0000e9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 5176 bytes
SHA-256: f8d397cad5fdb3fbdce2ce612ede5d3fd9edc4fb8b2556a4d6f1a5ba9248e05a
font_01_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 10032 bytes
SHA-256: 46ac920553693e02d96d211456993d89ef50393c2813c407a0e4102489c421b3

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