Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e125bf198bc173…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 08:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c589158ad8a9281fb6c74814b87ac3a0 SHA-1: 9c43b022e788e8e7c761c8b0774a20424257944b SHA-256: 36e125bf198bc173ce379089046e88b42651a6624803e9e5bc64f211339ea429
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 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://dafemum.ru/strik?utm_term=james+welch+winter+in+the+blood PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420934/normal_601b298774db0.pdfIn PDF document text
    • http://finovadi.iblogger.org/what_is_the_difference_between_graco_snugride_30_and_35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_603fef1e26d2f.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/susoxidatejifilhnps.pdfIn PDF document text
    • http://maska-respirator.com/11903174811s5cbq.pdfIn PDF document text
    • http://myshoes.moscow/sap_eclipse_oxygeneo4tf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_6051cf681550d.pdfIn PDF document text
    • https://zamokofoviwikaz.weebly.com/uploads/1/3/0/8/130815095/ranewidadedovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_60564b0c6e5c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fe10cf4a3e3b.pdfIn PDF document text
    • https://nilidufudomalo.weebly.com/uploads/1/3/2/7/132740748/ritelituxikalo.pdfIn PDF document text
    • http://copriyghtconfirmed.com/50579428818j76ov.pdfIn PDF document text
    • https://gazikurow.weebly.com/uploads/1/3/1/4/131452893/pelejobomikisax.pdfIn PDF document text
    • http://kleomaften.online/delegation_of_authority_matrix_excel_templateuv3ge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_60253a90c42d6.pdfIn PDF document text
    • http://mazers.fun/91365621430jibjz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_601b04c5bee8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lofekelatek.epizy.com/lodoxotitofukojoli.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/82188838097.pdfIn PDF document text
    • http://sedozod.rf.gd/tefakajulejipobofokeb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 5400 bytes
SHA-256: 4433aa1f949f6a0f7af8f98672f491b257dfb7a0dc3f8470fba321dbc0ac26c3
font_01_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 10808 bytes
SHA-256: 2160f1135b643191b5c0d7af2893de9c73fafb866ec216960c8420b2cdb60da8

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