Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce76b78ff1448739…

MALICIOUS

PDF

77.2 KB Created: 2021-04-04 00:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 79ae90f596bbba2953f2ad6d5152e30d SHA-1: f27c5dae365d56962dcc12abfc73d11f45551bcc SHA-256: ce76b78ff14487398b777b14f2eb534947a17daea1e68cb5218fd630c10d65f8
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a 'bahamas visa application form pdf' lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of embedded URLs and the link farm heuristic suggest the document's primary purpose is to redirect users to malicious websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/award?keyword=bahamas+visa+application+form+pdf PDF link annotation
    • http://wanididezaj.getenjoyment.net/kixofuri.pdfIn PDF document text
    • http://filuxunokenobud.mygamesonline.org/bhagavad_gita_as_it_is_prabhupada.pdfIn PDF document text
    • http://sagaguzasonip.iblogger.org/aviation_weather_services_handbook.pdfIn PDF document text
    • https://vakurizilobiwil.weebly.com/uploads/1/3/0/9/130969742/1743860.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/gjahiJF/bemabipomunepomajofexa.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/b5dd2.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/vigovuwojasevesar.pdfIn PDF document text
    • http://mateguwokalidub.getenjoyment.net/88732531760.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/BjfEaie/rolling_sky_original_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvomuvugu/ggiighw/hitman_sniper_2_world_of_assassins_ios.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/3327688.pdfIn PDF document text
    • http://theharaka.online/speakeasy_austin_bowlingzf6cv.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/ingo_accountability_charter.pdfIn PDF document text
    • http://sazinoz.mypressonline.com/pivesinema.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/63501365659.pdfIn PDF document text
    • http://ompala.store/lebol7pp6k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutejuviwolopis.rf.gd/89313565044.pdfIn PDF document text
    • http://lerefub.rf.gd/59151978665.pdfIn PDF document text
    • http://wimofulun.rf.gd/what_are_the_economic_activities_in_nigeria.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_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 5504 bytes
SHA-256: 5658af4a487f399e29fe96f442252b5219a69a399a219deb8a7c95f8f000e49f
font_01_sfnt_off000101b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B4 10580 bytes
SHA-256: 4daecbb4d1e9700c8780cc31180fbed70067da0f6d1cbd58187dbb4e625d0485

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