Malicious PDF — malware analysis report

Static analysis result for SHA-256 a468129c30f5ccf3…

MALICIOUS

PDF

74.8 KB Created: 2021-06-10 00:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8eed929c8f7483676f3704ba610959f5 SHA-1: 404faa83e6208ca913699c0bae867c0ff318e030 SHA-256: a468129c30f5ccf32cc3b9e536e0bcc2bc0fcc52b951d5a92b0d36137480f9af
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous external links, many hosted on disposable domains, designed to redirect users to potentially harmful content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/pbw?utm_term=among+us+mod+menu+always+impostor+ios PDF link annotation
    • https://pirusamu.weebly.com/uploads/1/3/1/3/131383726/c22720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_603c39ea53852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_60699aa98c36e.pdfIn PDF document text
    • https://mafakovik.weebly.com/uploads/1/3/5/3/135347242/5292874.pdfIn PDF document text
    • https://jedujidiki.weebly.com/uploads/1/3/4/3/134352610/poxunizamiwime.pdfIn PDF document text
    • https://zesefoposijun.weebly.com/uploads/1/3/4/6/134672262/9447672.pdfIn PDF document text
    • https://majojolug.weebly.com/uploads/1/3/4/5/134595566/12a61b0dc58f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477877/normal_60588be24c746.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_5ff4d0ee8f419.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144426525/minecraft_mc_heli_mod_1.12_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f69ba0-5e84-47fb-a500-5936358e811a/robot_wowwee_robosapien_v2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c0353b-c392-4980-b75e-938a1ec1d874/5444084858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f7d674d-fb99-43b9-9067-b7babb672976/how_to_solve_for_t_compound_interest.pdfIn PDF document text
    • http://zepupifob.pbworks.com/w/file/fetch/144671313/lelirexuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08eb5f92-3a29-4007-8245-05227f511eb9/twilight_fanfiction_the_pack_imprints_on_oc.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/descriptive_research_design_meaning.pdfIn PDF document text
    • http://wejojixi.pbworks.com/f/88544417140.pdfIn PDF document text
    • http://zuguwar.pbworks.com/w/file/fetch/144709353/xarujivitajadetoraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a8cbd5-1289-4a25-bfc2-5726eb141ab5/how_long_does_fcra_background_check_take.pdfIn PDF document text
    • http://pupowivala.pbworks.com/w/file/fetch/144643404/vijupuloloxezijex.pdfIn PDF document text
    • http://zedilowozare.pbworks.com/f/58674592788.pdfIn PDF document text
    • http://fozujedax.pbworks.com/w/file/fetch/144895809/2028847478.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144517245/65654763570.pdfIn PDF document text
    • http://kekirow.pbworks.com/w/file/fetch/144636177/how_to_connect_chromecast_to_android_without_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8708224a-3c76-46b1-87a5-2039ea7dd375/what_are_positive_behavioral_supports.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_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 5464 bytes
SHA-256: 6d7694a28987f38bdf89447c68ee3c524b16211bb1172406fb1813d955754ee3
font_01_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 10884 bytes
SHA-256: 4b3d69a696bf249936359718f6982f7c9c6ff5dfbf0c204c8bd99dd3cbb4e236