Malicious PDF — malware analysis report

Static analysis result for SHA-256 014498054ca3c745…

MALICIOUS

PDF

83.0 KB Created: 2021-03-18 09:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9d96b656a169e1b2b21ab4797af480c2 SHA-1: 4773ab306200b437aa60481df20d02dfd6e94199 SHA-256: 014498054ca3c7457a94cbdf6d7b8263e3b6efa4112f385f6ab117f1d75435c7
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of external links, indicating a potential link farm or redirection to malicious sites. The document body is heavily obfuscated and appears to be generated content, likely intended to mask the true purpose of the embedded links. No scripts were extracted, but the presence of numerous external URLs suggests an attempt to direct the user to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/award?keyword=how+to+cite+a+pdf+journal+article+mla PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393506/normal_5fe52f7556ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_6037dd63610ed.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/iifhaOp/montgomery_city_warrant_search.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/cjgNicC/vitamin_d3_dosage_for_copd.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujakosepa/jcAjeif/vezasowugisexoxerif.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/hgglpjh/first_strike_mtg_arena.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/fiff2LH/35104458117.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/dhe6xhb/zombie_strategy_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/MjhgjeI/52448672744.pdfIn PDF document text
    • https://cdn.sqhk.co/nopusixinid/ynjdiXz/41714088921.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/ThcN6hV/metojevezogefelunuluri.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/itzDjd8/dabovixamokit.pdfIn PDF document text
    • https://cdn.sqhk.co/vukixukafoga/N3phjjg/kaiser_permanente_jobs.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://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_a371c0cb193448809b4290af5b8170af.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_e7f504228bf1484f8c2a2d32c09d20c4.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_327c230e12d544518da54bd2aa4063f1.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_ecc9c5635ef741898ac6f2f991ea12f8.pdf?index=trueIn 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_off0000fa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 5132 bytes
SHA-256: f290baa4fd6dc9f052eb855e963f160d0e2dad91b4dea79c2e04e20f82bb47b6
font_01_sfnt_off00010bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD9 10780 bytes
SHA-256: 261c6eeaa377169421ffb5ee62e4a2465f749c20b055cfb79bff3dda17f5679e
font_02_sfnt_off000130db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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