Malicious PDF — malware analysis report

Static analysis result for SHA-256 da06d38b6d264775…

MALICIOUS

PDF

83.4 KB Created: 2021-04-04 01:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0509e0f1a9c093272efb6c2af8fd2329 SHA-1: 7d687e11ddf9838233aa807abfdb3d0f475d5569 SHA-256: da06d38b6d2647753f813e86854af1c70a686aeb399b8225bd214f7df459575e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://pelibifir.ru/strik?utm_term=johnny+b+goode+tab+intro PDF link annotation
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/676226.pdfIn PDF document text
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/zunabigukaborime.pdfIn PDF document text
    • https://bupuvebawa.weebly.com/uploads/1/3/2/7/132740405/xifemekovefus_vibiteritane_xovute.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/lord_baden_powell_informationg4a63.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/wovojut-bemepegibo-xogozosaj-zoregoful.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/B8jQ5ge/goruwitimakorid.pdfIn PDF document text
    • http://rudovatimokasum.medianewsonline.com/jiwiliza.pdfIn PDF document text
    • http://im-marceting.site/free_printable_coordinate_graphing_pictures_worksheets_christmasupovf.pdfIn PDF document text
    • https://welusagosa.weebly.com/uploads/1/3/4/3/134355806/665d2ab5.pdfIn PDF document text
    • http://fajamad.mypressonline.com/shipping_agency_company_profile.pdfIn PDF document text
    • https://lokanasa.weebly.com/uploads/1/3/5/2/135299929/vitabulo-zumajokemanaj-retupabot-piguresirelabat.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_080e99fa82354fb9abad011251f88cb5.pdf?index=trueIn PDF document text
    • https://ecc4b077-82d2-4cf1-ad45-1e482560a890.filesusr.com/ugd/5d7ac5_70c2cf1e825d46a28b323c5e34aaeb67.pdf?index=trueIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_ede62950ce854c5aa8c239f2a01d45f9.pdf?index=trueIn PDF document text
    • http://vujijemu.atwebpages.com/5286198808.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 5108 bytes
SHA-256: 493beedb5fe6b3169af7c70c660fcec7498950318ad7be3a6035a0cc3fa3caa9
font_01_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 12224 bytes
SHA-256: cff81904faae87f2e84f2d4c0f8b0b780039075c07cc71e91ee5037f606b0315
font_03_sfnt_off00012b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B68 16096 bytes
SHA-256: 13c540cfff82c4dbf750c4d8c74e2b7b4ef1ed85145f82e59f5e6266b522e2c0