Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e77165849d202d1…

MALICIOUS

PDF

85.6 KB Created: 2020-11-18 12:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b3cff3c68390092a4abf54ba3a032d9b SHA-1: ba26563f33381040cd8bd7dfa534b7c98f3984f2 SHA-256: 3e77165849d202d1b55761439e0356977f54ce724642f4bbe46fe44bd09e3c89
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to directions, suggesting a lure. The presence of multiple PDF links and a critical heuristic for a malicious redirector strongly indicates an attempt to lead users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/123?utm_term=harpers+ferry+iowa+directions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f954df910655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5fa3acb69f838.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/sijude_gepifexoxire.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/e5f5e8382.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5fb40865e5241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa85671-9207-4d6b-a7f3-d6765e3ce36d/togegusafumopelol.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/hoover_steamvac_carpet_cleaner_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/usher_syndrome_coalition.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/aqua_affinity_enchantment_id.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/gesowasijakujukavedujema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a0ea1b-daa4-44f6-a458-f10b893f16f8/loomis_book_of_art.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/noganulawesa.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_off000111ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FF 5272 bytes
SHA-256: dc6bb71ff10cc9cb1ae927e5131c839a04e50d05aeeb14438c8ced907ea3b055
font_01_sfnt_off00012414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12414 11024 bytes
SHA-256: 75805a767062b5f57fac3d6f9ec6b8269ae8084865bf85a8587ea6a861ed9d47

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