Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17f2d38eb42864a…

MALICIOUS

PDF

81.0 KB Created: 2021-03-06 17:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c3d0e4db78bba46b45f8858ea15b5d08 SHA-1: 102f605d99f65eb9821f98cfcb4348ae8fd0e0f2 SHA-256: f17f2d38eb42864a8da26044c85534daf45b46477cc35e46b9ebee9e4c63f92b
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 0.9954

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://lozipotod.ru/123?utm_term=world+map+continents PDF link annotation
    • http://mantenancie.com/92769173546lku80.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/1be96be.pdfIn PDF document text
    • https://rusekawavupor.weebly.com/uploads/1/3/4/0/134096427/fumezijutenonuzogo.pdfIn PDF document text
    • http://masalev.ru/what_is_the_lowest_income_of_the_top_1_percent2a0zr.pdfIn PDF document text
    • http://apsmall.space/gugowalajapagakuwoxuv8h0sz.pdfIn PDF document text
    • https://mepiguresibano.weebly.com/uploads/1/3/4/3/134352921/2872394.pdfIn PDF document text
    • http://auth02mobility.com/519749669492zind.pdfIn PDF document text
    • http://afterdealer.pro/invaders_classic_space_shooter_mod_apk8yuf9.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/polojonuditegaw7753.pdfIn PDF document text
    • http://ndfnasg.xyz/dell_studio_1737_datenblattt6tuw.pdfIn PDF document text
    • http://esmoney.site/smoke_editor_steam_effects_photo_studioszbq40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_602a17d6b2074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_603fcd30dba57.pdfIn PDF document text
    • http://baltika-trans.ru/long_division_worksheets_grade_10wweep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5ff947759032d.pdfIn PDF document text
    • http://itmax.info/mowedippg2z.pdfIn PDF document text
    • http://kyrgyztours.com/ischemia_necrosis_informationw6pdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5fe43eb44122f.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/is_rainbow_six_siege_a_single_player8p7sz.pdfIn PDF document text
    • http://apeech.ru/tavikojorototavdzrw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454049/normal_5fcf52e195308.pdfIn PDF document text
    • http://ketadiets.site/what_are_the_mortal_sins_in_the_catholic_churchpex7q.pdfIn PDF document text
    • http://3bki.ru/nomiwagafizodoweberozupamf2jc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jikopot/suitcase_fusion_8_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/bodo_old_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/55361519519.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_off0000f45b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45B 5020 bytes
SHA-256: 430541740bb1a13140b63377ab93c525646a5da31e67b3cc4fa7de41d30009dc
font_01_sfnt_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 10208 bytes
SHA-256: 9c9bb0cc86bd3662eb99a64f5dbc999d97c3e8d6aa6e539ba05661f82d404880
font_02_sfnt_off0001283e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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