Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b8dfd4e19e5330…

MALICIOUS

PDF

66.8 KB Created: 2021-02-02 20:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4a704f4dcc8b9e12b5d0002d8f27c66a SHA-1: 6c603a7c7144e218bef7535f02bc90202ea501ca SHA-256: 21b8dfd4e19e53307864e9539ef49f9c2bcd9939b3ac0135a55ef334bfc060be
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://seumenha.ru/aws?utm_term=itunes+windows+10+without+microsoft+store PDF link annotation
    • https://cdn.sqhk.co/kujusiru/ijFifJE/bubble_maniac_tea_house_company.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/giijgiA/93393384681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_601806dbce1d3.pdfIn PDF document text
    • http://jezewujedufeg.iblogger.org/radumavikewe.pdfIn PDF document text
    • http://tiximixisasosa.iblogger.org/84350219265.pdfIn PDF document text
    • https://xaxazusilu.weebly.com/uploads/1/3/4/7/134757455/14d71fcac5c3b.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/XpOih5p/minidrivers_game_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/QFWE6jf/85586015832.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/CjdX1ge/download_mansion_blast_mod_apk.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/8079985.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/iCXhiQz/outer_space_bowling_balls.pdfIn PDF document text
    • https://lewumirobubav.weebly.com/uploads/1/3/4/7/134762292/9839607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gogonof/35407467607.pdfIn PDF document text
    • http://fawepajemug.rf.gd/25298103078.pdfIn PDF document text
    • http://xikunajuverew.rf.gd/counter_strike_1._6_no_warzone.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_off0000ca9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9C 5244 bytes
SHA-256: cef07bb4a4d320d983653852a313c932f787cfb5a26e77f3fa1793eb266edf10
font_01_sfnt_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 9936 bytes
SHA-256: 3d6d76575d082432e7c51b9f1e4a33163c1368b6352dd0482e0712f71a1cc035