Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a392d81c1e7477…

MALICIOUS

PDF

111.6 KB Created: 2021-03-14 06:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 506c295c2f6b5617cef29358df87c3ca SHA-1: 60cbe85fbb9b899c2c385e2de54007f8de3119e4 SHA-256: 49a392d81c1e74771a321be1defbd1a3dd42e2c12615e5dae417bfcc2d975d04
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing lure. The ClamAV detection and ML classifier further support its malicious nature. The presence of embedded URLs suggests an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5659

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
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kuzutuzo.ru/award?keyword=battle+royale+book+english+pdf PDF link annotation
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/5310497.pdfIn PDF document text
    • https://feroxetisilujux.weebly.com/uploads/1/3/1/4/131409167/666580199.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453337/normal_60079f22b1483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_6030e755153f9.pdfIn PDF document text
    • https://barefofu.weebly.com/uploads/1/3/4/4/134492989/vuseretisuxax.pdfIn PDF document text
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/tinuwo-wajesusa-rexanexar-zofawoxow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_5fe3da068f3d2.pdfIn PDF document text
    • https://numezuledidi.weebly.com/uploads/1/3/4/0/134096646/f265ca70538f927.pdfIn PDF document text
    • https://jevokave.weebly.com/uploads/1/3/4/2/134266272/tugigege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5fdee726bcc01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_ca33c530c3954dfcb4edca16b4cfe184.pdf?index=trueIn PDF document text
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_ae75c29bb98840ec8916148d94164ca4.pdf?index=trueIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_30577f96676748f68bb33ab40ea7a4f0.pdf?index=trueIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_4dde1ed949964435a91a22b822995afc.pdf?index=trueIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_a751016a10eb47c18070644acdc1e76c.pdf?index=trueIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_3a700dade1a4429699bcfffb2b35f515.pdf?index=trueIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_1b09a3fa81a34f6ab1b3001102a0f1bb.pdf?index=trueIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_6ec5261d279744889568c6db3fbed7ae.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_848b8742094b43b6b0b1fe9cd9fe6150.pdf?index=trueIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_c16fca9ffb184d90abb9f6d60275c557.pdf?index=trueIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_2541214f2a3b454e86d8484206b47a0a.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_7236ba606483419c98bba66d94794ebd.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_396d4caa83724cd181816c1b87e98b1a.pdf?index=trueIn 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_off00015448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15448 22528 bytes
SHA-256: d00bb099bfa99f32303781c994781743cd84a75f2e2d1ab5fce5a88cb40c20cc
font_01_sfnt_off00019c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C50 5660 bytes
SHA-256: d6789af9a3058ba5deba57cc21fb0179a684426f5db43c2951277bd897642cfe

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