Malicious PDF — malware analysis report

Static analysis result for SHA-256 801da42d4840df40…

MALICIOUS

PDF

85.2 KB Created: 2021-02-28 19:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7efd51265f8d9a576fb43816a42b9e06 SHA-1: 6589165acfbd0b02ece51a3e0252737c5d326e21 SHA-256: 801da42d4840df4059566e40a2b76c9272d873eae51e14c15b12066a41a97e67
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a malware distribution or phishing lure, likely using embedded JavaScript to facilitate redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://dugedepap.ru/wix?keyword=modded+spotify+apk+no+root PDF link annotation
    • http://porizaritofo.mypressonline.com/skilsaw_circular_saw_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_600fecf518a99.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/punabiwusofepilotifuw.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/kujokeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_6037d1ae4bd69.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/divezu.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/IGrjhgg/digonisesefoven.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_5fe6c7c552a09.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/how_to_make_a_book_jacket_with_paper.pdfIn PDF document text
    • https://xuzopodoker.weebly.com/uploads/1/3/0/7/130738955/7da6fdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408853/normal_6006659ba975d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5ff31b80e72a5.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://s3.amazonaws.com/duzexefemosaxe/98582334212.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/heraldic_shield_templates.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_off0000ede7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 4964 bytes
SHA-256: d84b5f90ca65b408de52f435eef1d03f0705bd361d54b4e3cdbbc22e04c83dfb
font_01_sfnt_off0000fee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE7 10660 bytes
SHA-256: 23d47ad44d82cdf5b55ca60984e77018bb7fa3ae81434be2509b3b87c7236e2e
font_02_sfnt_off00012383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12383 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660
font_03_sfnt_off0001390e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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