Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0e590255979566…

MALICIOUS

PDF

79.6 KB Created: 2021-06-10 02:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2210d294fdf4bc5da051c4a4bd93d58b SHA-1: 9423c2c153ed5dad5a37de343720d4ece04bbc78 SHA-256: fd0e5902559795662a4dc35a1bde9cab3b6129042de0e62c62da2ac3f9d531fe
126 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 a phishing trojan. It contains numerous embedded URLs, with a notable heuristic indicating it functions as a link farm on disposable hosting. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://chcial.ru/pbw?utm_term=refiner+gospel+song PDF link annotation
    • https://zelidewa.weebly.com/uploads/1/3/4/3/134371532/04055d9e57f312c.pdfIn PDF document text
    • https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/3827051.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/5b58e3969e.pdfIn PDF document text
    • https://tedinuvade.weebly.com/uploads/1/3/4/3/134348171/bceddfdd1a81.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/89dd00.pdfIn PDF document text
    • https://tesebajaja.weebly.com/uploads/1/3/4/4/134402558/2765569.pdfIn PDF document text
    • https://xudemogarutigi.weebly.com/uploads/1/3/4/7/134733212/xasabinir.pdfIn PDF document text
    • https://nisolelajuzo.weebly.com/uploads/1/3/5/3/135319935/9052488.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6735058b-1a11-42ed-9c4b-9a9ac8a325dd/34307969810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1de1cf-0f1e-4d63-ad97-d0cfe54bd571/how_to_install_minecraft_hacked_client_1.16.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/719e51ae-b9ab-4f35-b3e4-34a5506f4a29/graco_nautilus_65_lx_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ec7d36-7fc2-4c82-8142-36e8f0c5527c/boyfriend_application_tiktok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9140d753-e94a-4a28-8973-0d61c6637e9b/rukotukapegetu.pdfIn PDF document text
    • http://wenitat.pbworks.com/f/vawovasipa.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/lokajokawonubagaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d5b351-096e-4e1f-bb54-40c89e175a08/rodisipozapomuj.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_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 4868 bytes
SHA-256: 84472c5ada4f6c6c39223dc4275c22df36754fb89e5e79804fb50609455453bb
font_01_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 10908 bytes
SHA-256: d60714651cfd8a2eef1cb078428151b5be2c58dc5b5327ad1881cb1d2f1fd9d6

Open this report in the interactive analyzer, or submit your own file for analysis.