Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99fa14321d687e9…

MALICIOUS

PDF

68.7 KB Created: 2021-02-16 04:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 01cfa510b99c3e8e3ed3f37fb9924c23 SHA-1: 92ab9362783354c454139a91af9b9911f2b1e4cf SHA-256: b99fa14321d687e9ef7ff6d1fb0641c9ee3a94633af30617160081f08e5a8014
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wb?keyword=diablo%20iii%20barbarian%20build%20season%2021 PDF link annotation
    • https://mutimerujufidi.weebly.com/uploads/1/3/4/5/134526942/a03b874.pdfIn PDF document text
    • http://allwoman.site/jifosisutaxetonlyx.pdfIn PDF document text
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/jomogigawiruka.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/soxodemexira.pdfIn PDF document text
    • http://chaptejvxz.fun/pumijewsmo10.pdfIn PDF document text
    • https://kobamaputoruv.weebly.com/uploads/1/3/1/4/131409310/moposesudukokega.pdfIn PDF document text
    • https://nizuwutino.weebly.com/uploads/1/3/1/4/131482859/b5c974103aaf91.pdfIn PDF document text
    • https://repitosa.weebly.com/uploads/1/3/2/6/132681506/8207144.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/kuwazasasuxep.pdfIn PDF document text
    • http://bitcoins-profits.com/monuboguvototozapejegsu5x3.pdfIn PDF document text
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/9555538.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/futamo/bird_land_paradise_1._47_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/gd_t_basics_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/baahubali_2_cut_songs_masstamilan.pdfIn PDF document text
    • http://jumametewarad.rf.gd/sinusitis_tratamiento_farmacologico.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_off0000cf40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF40 5144 bytes
SHA-256: f87af37ee04786290f5dc979102d33fa6d9d5102b3b0ffe11f1d70d33db115de
font_01_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 10924 bytes
SHA-256: 4868e9235fe6542e45774e9d01f749baf768f248cb3fc35cf55227a821fd1481