Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6acf8841f7c2c26…

MALICIOUS

PDF

79.2 KB Created: 2021-04-01 17:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 72d8fdc01e539f9e4052b7fa0926391d SHA-1: 56eb884e03fce7fbc8b6adbeed941966bd9f5bf9 SHA-256: e6acf8841f7c2c268dcdec93e074d97f35583f6f31ff8616006a228bee317488
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The embedded URL 'https://jottigo.ru/award?keyword=abundance+peter+h.+diamandis+pdf' is the primary indicator of the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/award?keyword=abundance+peter+h.+diamandis+pdf PDF link annotation
    • http://warokibujiz.getenjoyment.net/bordereau_d_envoi_exemple.pdfIn PDF document text
    • http://rowewuxeg.getenjoyment.net/search_a_shortcut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5fca7116a6d8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_605dc321a000d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5ff8575d1f6f6.pdfIn PDF document text
    • https://cdn.sqhk.co/vanatuwo/uhdidpk/xozidupemiragezofipote.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenelavup/tPidjii/mavuxunuzazikatatiluruto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_a9d5b1a8b3c144958be29175c6475c26.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34906c7-eb76-4a98-8992-365677b815c8/lawusoranujizododax.pdfIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_10905e131a684c788a696ec98805a556.pdf?index=trueIn PDF document text
    • https://edcef860-f8c5-4905-824e-468e777b1324.filesusr.com/ugd/99b222_20a9dd77956c4c2f842a28ca6c2049db.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_f3cc72e162a84089b140dc0f3873f895.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_ef1397b41b8744b3a0967f0971df6c4a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e10de314-3494-4832-91d0-f3fd8e97301b/toro_string_trimmer_parts_home_depot.pdfIn PDF document text
    • https://0524119b-9543-44d4-a9c1-6a2a85ae2681.filesusr.com/ugd/b12506_3cac4e8e9a324fec9ffc09c1862027f6.pdf?index=trueIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_d73f4bca8af74a1ab455955cfa5b779b.pdf?index=trueIn PDF document text
    • https://be9ca920-c372-4566-b00d-544f92814f3b.filesusr.com/ugd/f0c5a9_8bc31562f1c34c54a3d6489a8f64309b.pdf?index=trueIn PDF document text
    • http://tudugir.atwebpages.com/teragamidop.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 5524 bytes
SHA-256: 20656359ac173e4a4b5d93f85affc060f8ed2487c708477ed2ff958e15b2d1b1
font_01_sfnt_off000107dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DD 11308 bytes
SHA-256: a4fddd1f29344e7a545537709f6e8de2f05ddd9528cf89fd028ff8c3f0cf2592