Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9811dd227c11cf…

MALICIOUS

PDF

143.3 KB Created: 2021-03-26 09:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 58ba0cfb0169a64cc076995a849a4278 SHA-1: af4731e4198d032f64418079c02e93e2f0a9f5ff SHA-256: 0b9811dd227c11cf238dd4338f5700390db35ade320205c27d0922738fd08bc2
206 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further payloads or redirecting to phishing sites. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jacksth.ru/wix?keyword=tomb+raider+2+ps4+trophy+guide PDF link annotation
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/71d87eecca8538.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417999/normal_5fff691511ea8.pdfIn PDF document text
    • https://cdn.sqhk.co/gudopokobipa/5hbhhib/apple_music_family_plan_student_discount.pdfIn PDF document text
    • https://rugeponejap.weebly.com/uploads/1/3/4/4/134487210/vejewejuguzekun.pdfIn PDF document text
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/xotiwasasanodenusam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479679/normal_5fd8698abacd7.pdfIn PDF document text
    • http://galubiwigo.iblogger.org/aeroplane_song_2018_pagalworld.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/sejiwuvegisewerogub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413108/normal_5ff7d48216d2e.pdfIn PDF document text
    • https://cdn.sqhk.co/mareduviger/K8jbjcd/82665853084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_38703ad05abb44039b1345b1c428e1c3.pdf?index=trueIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_f96701d4e0a646ee8a4b4fe27bd9c1f8.pdf?index=trueIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_5e19450f75ce43be94e448d7de2b85ea.pdf?index=trueIn PDF document text
    • https://38c64f87-0506-4925-a3a1-425743e24937.filesusr.com/ugd/386d45_0d3b4428a2764d2183aacb0112696d40.pdf?index=trueIn PDF document text
    • http://xaralinafa.rf.gd/lerimijijo.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_a13535c1aa9b425db2cd03d2a76f719b.pdf?index=trueIn PDF document text
    • http://vogidefoxafubis.epizy.com/sheet_street_towel_rack.pdfIn PDF document text
    • http://jemukibupafezov.rf.gd/87901296006.pdfIn PDF document text
    • http://vukixom.epizy.com/amenaza_de_aborto_sintomas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E9CE 5528 bytes
SHA-256: dc9b3b9891163df7af37926532e47d0f9197af8e4feb6ce209d811d021e032dd
font_01_sfnt_off0001fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCA2 10912 bytes
SHA-256: a0cf64c6cde9bf7fd79f3a771eb5d5c51ce76a44a02cd6cbe61deac4944d52d9
font_02_sfnt_off000221b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221B2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f