Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2bdf9e3f13b397…

MALICIOUS

PDF

72.7 KB Created: 2020-12-31 02:05:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2d3ca8f4916f3da4ba9cd03904d6b37b SHA-1: 20494ee0434a7704aedae2a90e445e2f0b663ab8 SHA-256: 6a2bdf9e3f13b39743c77527eecaa723bb36427710ac2acfb23fd914004861b7
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external links suggests a link farm or SEO poisoning tactic to attract victims.

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://cctraff.ru/strik?utm_term=rival+knights+apk+mod In PDF document text
    • https://cdn.sqhk.co/jumupebuvi/jijbgg0/diversified_benefits_services.pdfIn PDF document text
    • https://fijisakotapabe.weebly.com/uploads/1/3/4/0/134013267/f94483b3e.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/gg7xift/sikh_police_officer_killed_texas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/220a2e1b-24f5-4516-8235-47fb17eaaa26/gdpr_privacy_and_cookie_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/waxifujagogatizegoponoxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731b2238-905a-4de0-8d7a-013e4725e665/rewixutezabab.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/apa_format_argumentative_essay_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/android_online_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/2531631094.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/lsat_preptest_88_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9648240f-bbf5-42a6-bacc-5a13bfdb9e49/xebuse.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/76411577034.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/how_to_make_amends_with_someone.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/joxugozurinotisupoxaro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DD 5076 bytes
SHA-256: f850e31317ceb7cccef53cb1da39cf4a7f8614d7e0b8b8863263a5f3ec791967
font_01_sfnt_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 11100 bytes
SHA-256: 487a66fae8473541aee87a602fc8754163f5262ad2df2d50fa12f4f4fc3e4e80
font_02_sfnt_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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