Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2034d3b97e9cb18…

MALICIOUS

PDF

73.8 KB Created: 2021-01-20 16:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7f82f398c39f8ebd84584332769e4abd SHA-1: cf34d8fb240d88fe0006d9ac45dceef3c057f032 SHA-256: f2034d3b97e9cb18796630e9ef63a9fbdd8289dfeea180292b88e7e1e324a389
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains multiple embedded links, with one specifically identified as a redirector to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous links on disposable hosting strongly suggest a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Highmark health options provider manual', likely a lure to entice users to click the malicious link.

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
  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffmen.ru/123?utm_term=highmark+health+options+provider+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478141/normal_5fa86837a1b47.pdfIn PDF document text
    • http://xilagima.66ghz.com/aspirin_primary_prevention_guidelines_diabetes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5fd814a9db080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482625/normal_5fcff617d2582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_5fbc001393d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_5f9d23f0c063e.pdfIn PDF document text
    • http://jigatinapa.22web.org/62911287303.pdfIn PDF document text
    • https://site-1172540.mozfiles.com/files/1172540/xepojijet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovuzizosagedip.epizy.com/what_is_cuneiform_in_one_sentence.pdfIn PDF document text
    • http://donafilozevore.rf.gd/taxunavatixegifiv.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/tonovug.pdfIn PDF document text
    • http://sobibuxasegisun.rf.gd/free_html_website_templates_2018.pdfIn PDF document text
    • http://segudufarus.epizy.com/23078588410.pdfIn PDF document text
    • http://jeragapa.epizy.com/latest_discoveries_in_science.pdfIn PDF document text
    • http://segixiw.epizy.com/54606578083.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_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 5456 bytes
SHA-256: 006da6391f7bda3059ecb39e86049868d9a58a8c59efffac9fc2d9fdd5fa8926
font_01_sfnt_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 10904 bytes
SHA-256: 6b10219d24ade8350b08bb081bd21f2c7ff2fcdf57020e338b053232077de8e8

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