Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f63195c172961f…

MALICIOUS

PDF

102.0 KB Created: 2021-04-04 15:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e1635a136def4b6a336ed0a21f74b953 SHA-1: 222481c1c6bc71d8f701360d01546ab239fbe3a2 SHA-256: b1f63195c172961ff348174891d05b271d094215eaffdb137d53b1e38b1a4743
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links pointing to external websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the document is designed to host a large number of links, likely to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/wix?keyword=yesup+statue+guide PDF link annotation
    • http://jiwilufaxa.iblogger.org/chloroform_levels_in_tap_water.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_6062de5aab854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_6064384016df3.pdfIn PDF document text
    • http://xuxodowenam.getenjoyment.net/pikosurexotadexowawaw.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/alive_piers_paul_read_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_6013ca15a4b9d.pdfIn PDF document text
    • http://konanozopesan.22web.org/94283445848.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5ffa3827bf6c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_6034fbc1f12db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_601621a46f10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443344/normal_601cb40d99851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_6018b4c589feb.pdfIn PDF document text
    • http://zedateve.mypressonline.com/joseph_schumpeter_capitalism_socialism_and_democracy.pdfIn PDF document text
    • http://gegolab.iblogger.org/79290876267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463532/normal_5fe3eee067917.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/apple_tv_3_jailbreak_benefits.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6047e1e33968f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejajesenopezoj.onlinewebshop.net/17548143322.pdfIn PDF document text
    • http://muvipej.atwebpages.com/13241746609.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/48747853173.pdfIn PDF document text
    • http://tuvatopuvonu.epizy.com/nibonajusog.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_off000150bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BF 4960 bytes
SHA-256: 1d9d04a37cac12b8a36b1a6e4cb3f19f364871ec16daa96718b584cbf7046d97
font_01_sfnt_off000161b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161B7 12796 bytes
SHA-256: 49f5f9d3f811f3b9b9286aa9182eb2cb502971cf1b292d415a29c30960311ee7

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