Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07fe35bd2f3dceb…

MALICIOUS

PDF

96.3 KB Created: 2021-05-06 23:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 165ab0e023e72e3d8971f11de2c5239b SHA-1: 5c2cd4a91db2b527684ba8647cdaef70d834b523 SHA-256: c07fe35bd2f3dceb7388ce253217f1fb8f1b9f821326927d810ab13147cd6fb4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or direct users to potentially malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or SEO scam attack pattern.

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.
  • 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://lozipotod.ru/strik?utm_term=breakfast+at+tiffany%2527s+nyc+apartment PDF link annotation
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/8194266.pdfIn PDF document text
    • http://about-fb-support.com/wovedavaxa4bmzg.pdfIn PDF document text
    • https://pedogore.weebly.com/uploads/1/3/2/8/132815008/1859465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473645/normal_60048e36e9fb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_60525422ed531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_602c0cf27b540.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/03eaa338f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5ff9bb690b44b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_601fcff4011ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_603f488ecbe89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_602d938048f08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_5fd03cb40354f.pdfIn PDF document text
    • https://ruzowevo.weebly.com/uploads/1/3/1/4/131453610/zepurekuvazoxupem.pdfIn PDF document text
    • https://zofoneparadi.weebly.com/uploads/1/3/5/3/135341866/6c200e5cbdb9e60.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/3421011456801ace.pdfIn PDF document text
    • https://tasimaxexakopox.weebly.com/uploads/1/3/2/6/132681882/sofededopaxogefuxo.pdfIn PDF document text
    • http://insuranceautousa.com/99809599802ysb7v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_601861b2166f7.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/6446375.pdfIn PDF document text
    • http://maxist.ru/h._o_full_form_in_post_office4q7mf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000138fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FC 5380 bytes
SHA-256: f9f9a6a1954b9eb39892d580e6d98204eb34a7cc1427c9e110d56ef5f70669e5
font_01_sfnt_off00014b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B4D 12036 bytes
SHA-256: d007c46f4b1f249e950c8b2974224328059eb5436a0833cc9b40c7b69bbcb1fb

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