Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a062f66541a3ce1…

MALICIOUS

PDF

78.1 KB Created: 2021-01-19 03:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e535d848e85aa987a1d0326290b7ddff SHA-1: 75bd463bfbf12c48e726009c1345cd4fdd6169c1 SHA-256: 2a062f66541a3ce11d89511a1caad9afc2f88188e15e54a52266ff5023515411
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a specific URL with 'utm_term=bitlife++on+pc' indicates a targeted lure. ClamAV and ML classifiers strongly indicate maliciousness, consistent with a phishing or malware distribution scheme.

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://baarspo.ru/aws?utm_term=bitlife++on+pc PDF link annotation
    • https://nagigezivozitos.weebly.com/uploads/1/3/4/3/134340852/161ba.pdfIn PDF document text
    • https://site-1177634.mozfiles.com/files/1177634/cara_membuat_bookmark_dengan_adobe_reader.pdfIn PDF document text
    • https://cdn.sqhk.co/pejasibupap/NxzjhoB/3711734625.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/50Ke09Q/93508847965.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/chdgeif/fajumor.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/0hae738/foxijarive.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/54pgHI2/survivor_australia_2019_rope_broke.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/IGjajau/taguvunilelilekizufavuza.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/ec1d2161d.pdfIn PDF document text
    • https://rupevegix.weebly.com/uploads/1/3/4/8/134887155/wawegesunigova-luvikugezebize-suzafizufilirow-gibafomo.pdfIn PDF document text
    • https://merasewutid.weebly.com/uploads/1/3/4/3/134348660/bebexabid_lutubezusi.pdfIn PDF document text
    • https://cdn.sqhk.co/medukukekuke/idFpijO/burnout_drift_2_pacogames.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/ifW2gck/dance_hits_90s_uk.pdfIn PDF document text
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/4490599.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/060508426.pdfIn PDF document text
    • https://sugemisikuwev.weebly.com/uploads/1/3/1/8/131856456/963026.pdfIn PDF document text
    • https://cdn.sqhk.co/tezuzerise/fjaghBV/arcade_games_all_in_one.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 4576 bytes
SHA-256: 4583fd98a5fb08a82851dfbfc6dc4a5bac03fe321186bfd58f849162bb4810eb
font_01_sfnt_off000105ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AB 11200 bytes
SHA-256: 5adfc5d21f9f96d4d02a13e221c06239e7cf3ceb359503cdcddaf200d3af1f3d

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