Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c3e7b530bf224f…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 19:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7ea99ec0becf9f804d5dde0129836c8b SHA-1: dfb7a026b8995481ec62a4e87e8d9462c93fb80f SHA-256: 16c3e7b530bf224fccf35c7ad31fe57d4688423a9ec96f545f49a192204e01b8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://golowaki.ru/award?keyword=tl-wr841n+reset+password PDF link annotation
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/vejegeva.pdfIn PDF document text
    • https://sujujawajiz.weebly.com/uploads/1/3/5/9/135964945/564fde9.pdfIn PDF document text
    • http://varistop.site/mawatesedegf7vf5.pdfIn PDF document text
    • https://cdn.sqhk.co/zoravuzulop/anhYx1l/fagiwa.pdfIn PDF document text
    • https://pemiliruvobavex.weebly.com/uploads/1/3/0/7/130739389/tiruliralewesen_dejij_sitotabowebew.pdfIn PDF document text
    • https://gakififevorejep.weebly.com/uploads/1/3/1/8/131872199/3049852.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/2111471.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/jiifgfQ/51960240292.pdfIn PDF document text
    • https://dexidexida.weebly.com/uploads/1/3/4/2/134235246/xisipusuro.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/23943294328.pdfIn PDF document text
    • https://pigiburoletu.weebly.com/uploads/1/3/2/6/132695467/d87680.pdfIn PDF document text
    • http://meetraisins.club/motamajedogutexorisadegc06em.pdfIn PDF document text
    • https://sagojuxejuzogug.weebly.com/uploads/1/3/4/5/134598596/segis-damuxo.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/special_air_service_training.pdfIn PDF document text
    • http://vashastrahovka24.ru/yamaha_dgx_660b_priceqzedi.pdfIn PDF document text
    • https://kajanivok.weebly.com/uploads/1/3/2/8/132814977/koxojutifeve.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_off0000e274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE274 5360 bytes
SHA-256: a89e32882e10f279de32b1699585033f169f91de32ac8128ef284920041b70b9
font_01_sfnt_off0000f4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DC 10332 bytes
SHA-256: 24d9f2d372bff50eeb0df15f08cb225a00d25f959737e3498b2aa18e1dab6ad9