Malicious PDF — malware analysis report

Static analysis result for SHA-256 61060fe3624b58ff…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 04:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9d16cea1b7b390c0fdea4da48395de45 SHA-1: 255f0185d7640fd035d4e1dbb398d7e5b1533e7a SHA-256: 61060fe3624b58ff696e99ae17578ce87985ae36902ba6ddae3a74525479162f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent link suggesting a song download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests a link farm designed to obscure the true destination, which is common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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 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://baarspo.ru/award?keyword=deool+band+mp3+song+download PDF link annotation
    • http://lojapidabud.mypressonline.com/nomizisujirukotatuka.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/loxajupareviloreriki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_60186e15bb977.pdfIn PDF document text
    • http://retamos.mygamesonline.org/86681472312.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5fc99735d50b8.pdfIn PDF document text
    • http://varnisvakq.ru/gosavavedutamovaxopibyyojw.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/what_is_the_best_portable_cd_player_on_the_market.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/the_language_of_composition_second_edition_teachers_edition.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/star_wars_far_horizons.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/how_to_change_the_code_on_a_garage_door_opener_liftmaster.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_601cec91f1893.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fc98aaf566d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tisiwiruligeg.epizy.com/dinghy_towing_guide_2007.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/karujavonekizoveved.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/23004708115.pdfIn PDF document text
    • http://sejabozewilobog.epizy.com/really_difficult_riddles_with_answers.pdfIn PDF document text
    • http://duvodix.myartsonline.com/ktm_990_sm_owners_manual.pdfIn PDF document text
    • http://doxewadafexe.rf.gd/functional_exercises_for_seniors.pdfIn PDF document text
    • http://bobosuvediv.epizy.com/alpine_ktp-445a_wiring_diagram.pdfIn PDF document text
    • http://ponazuxunuruko.rf.gd/tulabatim.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 5580 bytes
SHA-256: 77061fd7bdf7093a3caddee26af490a1e68d241e3d16e97cfce8ac7519ae4163
font_01_sfnt_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 10904 bytes
SHA-256: 6eac1c89c29cb3e53f75f05d8c13db98c824965fee2cacc3c74653bc10c67b2f

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