Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f449cd03e239721…

MALICIOUS

PDF

63.3 KB Created: 2021-01-29 09:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 52777d01083b015560a1b951492e7b00 SHA-1: 3c1ca85ef263d3bca1afe3abb1a79ef215373aac SHA-256: 8f449cd03e2397212cb6eaf49fe6e9fa810a1f01844aaa77fc35b2b091589c3a
186 Risk Score

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://bologen.ru/wb?keyword=block%20fortress%20apk%20latest%20version PDF link annotation
    • https://cdn.sqhk.co/dutaxato/61fviiP/huge_asteroid_hitting_earth_today.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/EiriHgj/74232123202.pdfIn PDF document text
    • https://vajipexinonadol.weebly.com/uploads/1/3/4/0/134096003/1929895.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/wabojebijag.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/sosemedemomil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469850/normal_5fe5985f2cb7c.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/m8QSgiP/91631335172.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/jchfB7u/22849472460.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/b1WRBjj/find_my_phone_location_by_number.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/2357541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_6011c7d7689ed.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/jCighe9/pabiwofarisu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368763/normal_5ff68d0b5a8ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gejujebiwibi.epizy.com/bubble_bobble_nes_game.pdfIn PDF document text
    • http://toxalotivip.epizy.com/10960110562.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_off0000bc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC65 5180 bytes
SHA-256: 246656a70b5f108c28310dd5ce48b8f715aabdb3f9043097599306b09e6a74d8
font_01_sfnt_off0000ce27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE27 9952 bytes
SHA-256: e9be3b5c6fb5918e726624a9fb70aeb8650d6774e4f192077b21d02c301e39b3