Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb3a8dce9132afc…

MALICIOUS

PDF

67.2 KB Created: 2020-11-20 00:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8f34619ba513a4ee88a5beb7972aaf21 SHA-1: 16890ab3e146319e4405c4e16d9cae5830f8e663 SHA-256: 2fb3a8dce9132afceb38c0a64fbc5c281b8caa399429ca9a1586fd90122e462e
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://gettraff.ru/strik?utm_term=metamorphosis+of+a+criminal'. This indicates the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of malicious links and the PDF structure strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=metamorphosis+of+a+criminal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f9f2711067d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_5faea290f0a0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f9d0f0b7709a.pdfIn PDF document text
    • https://lesajevix.weebly.com/uploads/1/3/4/3/134318042/begizuvewil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5fa56992971a7.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/polexebuj/glencoe_algebra_1_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/71431799130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23807f8c-e163-44b2-a6eb-75378f13bde0/vce_exam_simulator_2.6.1_crack_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5ab212-387b-4c3b-8886-927143bc6867/gapuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/futafubasukinolabig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7537ac04-d554-4b3a-b29b-22bb94767361/palaxakovosisizizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ac4f61-0e22-49ce-b56f-7ed98149b0ce/81825349482.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/52465546283.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_off0000c94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94A 5260 bytes
SHA-256: 676e7e0589b31abc5f318d7fb488e8863bf2327bcc3185309b514034b2233113
font_01_sfnt_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 10868 bytes
SHA-256: 322d3bf6fb92052f787fccc7c0d9fa0fe9c8c85c4d7e9fe4e81c882270e275b0

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