Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c26b83206f55f2…

MALICIOUS

PDF

69.4 KB Created: 2021-02-16 17:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 421a1c9173285b3acd932cc1049a1cc0 SHA-1: 6bf534a504f8a461c25dfbf388722057d71e03c3 SHA-256: b7c26b83206f55f2b0fde0d3fe8381470f759b66711492d068e217c9e1047a7b
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/wix?keyword=holo+launcher+apk+descargar PDF link annotation
    • https://cdn.sqhk.co/kuvuzebilet/ifMpgha/baldi_birthday_bash_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/hd6icif/83775569744.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/BLhiXN1/article_spinner_and_rewrite.pdfIn PDF document text
    • https://cdn.sqhk.co/tofigidukug/oic9dXc/34409874728.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/sphdx2u/6650149459.pdfIn PDF document text
    • http://winoorama.space/kugoxonuramofezexapuvavjtey1.pdfIn PDF document text
    • https://cdn.sqhk.co/xonudutixova/9Egggfa/7221235766.pdfIn PDF document text
    • https://jajesawi.weebly.com/uploads/1/3/0/8/130813829/dimodikelisuliw.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/hjfgcjd/steven_universe_colouring_book.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/3f88637.pdfIn PDF document text
    • https://tazanuna.weebly.com/uploads/1/3/5/9/135977230/6864277.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/hg7OjhB/foxevetelaluzune.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/hgf4sgf/21643009155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rewezaxow.epizy.com/adobe_reader_portable_version.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/bhakta_kanakadasa_kannada_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/57980573611.pdfIn PDF document text
    • http://tonixororonimi.rf.gd/free_website_templates_for_export_business.pdfIn PDF document text
    • http://pebulibupa.rf.gd/inspiring_songs_free.pdfIn PDF document text
    • http://faxunarin.epizy.com/letter_h_worksheets_for_kindergarten.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_off0000d1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B8 5360 bytes
SHA-256: cb26840bef8cc830a443dae4b35079ff3bc1ff7ec6c8d44a84a49b5100b609c0
font_01_sfnt_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 10596 bytes
SHA-256: 9b513c6b0923e55c1cbcedd9b567ccd82f5fc6cf1cd09ff2a37e11f2e98e5c83

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