Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8a49b717501132…

MALICIOUS

PDF

116.4 KB Created: 2021-04-02 23:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c783746180f4426a8f444086419a5b6 SHA-1: b780ee0725111f3469bea47b6dab330ba31f5b6f SHA-256: fc8a49b7175011328463ed0903099b30a3638069cc260aa4bcdc77422b91aaa0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or to download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=pathfinder+sorcerer+healing+spells
    • https://static.s123-cdn-static.com/uploads/4419191/normal_5fedbbb65fe72.pdf
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/615305.pdf
    • https://cdn-cms.f-static.net/uploads/4412403/normal_5fdb6222b83ff.pdf
    • https://mexekujiwununiv.weebly.com/uploads/1/3/1/4/131407761/negosobex.pdf
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/kovur-tuzavuvup.pdf
    • https://cdn-cms.f-static.net/uploads/4369503/normal_602a11227738e.pdf
    • https://cdn-cms.f-static.net/uploads/4386852/normal_602b34f024147.pdf
    • http://babubusawase.22web.org/3ds_max_2017_trial.pdf
    • https://dizegeduwawab.weebly.com/uploads/1/3/4/3/134374994/705977.pdf
    • https://xekurisiwa.weebly.com/uploads/1/3/4/4/134401096/pawigi_senev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kubagaxupusu.epizy.com/mofurewaxiromufipofu.pdf
    • http://xitozafa.epizy.com/29769063075.pdf
    • http://kovoxajinuf.epizy.com/24208207051.pdf
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_910ade42938240868701a5ed1efb56d5.pdf?index=true
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_2ea07aead6ee4c32a77fa0b985c424c7.pdf?index=true
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_a128ba46447d4fafa6722dd01a9d8555.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d00.bin
e761e47fb73770fd1d2a7a23cebd936a63455519b417ef8914509ec4317be420
pdf-font-stream PDF embedded font (sfnt) at offset 0x18D00 5420 bytes
font_01_sfnt_off00019f70.bin
46e375792408a923618dc0161ea327b28b51209afb61ef5a2b834fd92c72c901
pdf-font-stream PDF embedded font (sfnt) at offset 0x19F70 10820 bytes