Malicious PDF — malware analysis report

Static analysis result for SHA-256 41915395b0bcb613…

MALICIOUS

PDF

102.4 KB Created: 2021-03-23 22:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 206473a1014f2ec167ff2f64b68800af SHA-1: c7d3135d51f6355f74a5a4b9c7e3cbece0b10679 SHA-256: 41915395b0bcb6136590e6323d6885e82e41439fec6890d444b35a8273ca18af
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://leonvi.ru/strik?utm_term=what+is+the+best+feng+shui+bed+position PDF link annotation
    • https://cdn.sqhk.co/fokofike/czjdSJ3/supadoxunoxir.pdfIn PDF document text
    • http://tuzupibu.scienceontheweb.net/definicion_de_bacteria.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/Qhghgii/zelosotobezazokibukot.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/cicjhji/2276550538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_602882015ff74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_60046a6432b44.pdfIn PDF document text
    • https://cdn.sqhk.co/resekobe/ihgiggi/73917416448.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/cuales_son_las_clases_de_sistemas_del_cuerpo_humano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5fd18bece93e8.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/saxulokidutilewufene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_5fdb5b750d2fa.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/nipawozudegejoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/texalefa.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/77569860717.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/lagu_ost_missing_you_korean_drama.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/82202662154.pdfIn PDF document text
    • http://batapijas.myartsonline.com/where_do_you_find_expiration_date_on_britax_car_seats.pdfIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_01869c048ec2443e8ed186ecb1ae58ad.pdf?index=trueIn PDF document text
    • http://miganuvag.myartsonline.com/edit_file_to_word_online.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_aac3783a869e4e6dbb4b942304bab579.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_598ab7f134144089ba3b4a0e57f144ba.pdf?index=trueIn PDF document text
    • http://muzulozak.atwebpages.com/gerezuvigaxuposafuximete.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76D 34404 bytes
SHA-256: 1ac91ded0e5444dbe72588ca9cd1a315ccb0e91b13426aaf451db1a8a9f8c8a7
font_01_sfnt_off0001527c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1527C 5328 bytes
SHA-256: 0bb5fc71288dd370d6e5c6b82c200fea0fcf2a0c0c373c29f4bedfd8e5d74f71
font_02_sfnt_off000164a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A9 11008 bytes
SHA-256: 536724e047aaedd962143efc479d5bd0e5d65ea2a2ea6ae18c04f98f8b91519d

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