Malicious PDF — malware analysis report

Static analysis result for SHA-256 5762a23b4288a7bb…

MALICIOUS

PDF

46.3 KB Created: 2020-11-04 02:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4bfae9d43041522b3604248108523f7a SHA-1: 1b6f825565a58df0e0b3078669bd1015e61c13f5 SHA-256: 5762a23b4288a7bb65ed43f4926b69d62e1dffc7f1a3a9fbafe49e91c6bf86fd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'My Hero Academia episode 35 dub', likely intended to entice clicks. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly indicates an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=watch+my+hero+academia+episode+35+dub In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f8e58b5e5cea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f89eedab8b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f883909e8779.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/6748016.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_5f97d25ce48d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5fa1dfb1840b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5fa1637f28b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f8d63133d22e.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/digokasawuj-jipamuputevuf.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/demimesegumi.pdfIn PDF document text
    • https://muvitaburire.weebly.com/uploads/1/3/4/4/134441723/5df37959127aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5f8d06294c5a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f9e20a3b5644.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/jixerubowi/xumivadokuvowu.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_off000069bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 2920 bytes
SHA-256: a986119c16e44081cc8e25afede66da4c613bf9b2bda1169c6dfb8b692a7cff1
font_01_sfnt_off00007416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7416 5824 bytes
SHA-256: 494176f9f8a163bd2b8dfaeb347c556c75a84ceeba8d54a3c853d36b792f4507
font_02_sfnt_off000087ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CA 10656 bytes
SHA-256: 83e329ce2ebc8e1270301abd50c4eac649c0bfe0410f9c81a5d32265e0ca7834

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