Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b5364cd2237416…

MALICIOUS

PDF

86.3 KB Created: 2020-12-06 20:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b683336bb76f4ddc503e15b2ddcd8b35 SHA-1: c6340000b692ca31c430dd6fc303664cb9612cc9 SHA-256: 15b5364cd2237416ec33a0e8e06d0c5c78a23ec4dedb774285db4d3e89df59e5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains a large number of external links, with one prominent URL pointing to 'traffnew.ru', suggesting a phishing or link-farming attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a potential for malicious redirection or content delivery.

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
  • 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://traffnew.ru/123?utm_term=html+css+for+dummies+pdf PDF link annotation
    • https://pebetojakudasud.weebly.com/uploads/1/3/4/8/134879391/gowolizodaxowoji.pdfIn PDF document text
    • https://gemamiji.weebly.com/uploads/1/3/4/3/134372226/b7ba5345948c6.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/8584913.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/kabobi.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/sewesenepatike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe04cf18e72e5fdb9d981f/1606288591796/tedupubiwusisapizutas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc19af25147b148046fd18f/1606523635154/we_buy_pecans_las_cruces.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e90c27a199023ab56552/t/5fc31a22173fb5383b095fcf/1606621731968/63304047543.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf616c18e72e5fdbcf89da/1606377837002/pamibip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64fc43398ff7515529cec/t/5fcc76dec836a917f9057f3d/1607235307373/generals_against_trump.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1050bab79f442f22a407f/t/5fc5b06d61e25426e1fc71dc/1606791277644/schology_dodea_edu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc0eda0bc819f1cf4f98c4a/1606479273219/watch_the_mentalist_season_4.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/japodeka.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/cathode_ray_oscilloscope_questions_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011b8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11B8E 28540 bytes
SHA-256: 29434d6e4162caf8c12fc224c5d504de5b2ca28b7e1ebc62ee075d2907f14f37
font_00_sfnt_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 5052 bytes
SHA-256: 87671ec6af5a697cb62069c781b1ca98cd33825c2459b4a6e85d3becdbe72043
font_01_sfnt_off0000f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF496 11404 bytes
SHA-256: ecd53c53937cd35d72e4705f153403bc9f902b3209dfa1e6c034d5dfcbc1d584

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