Malicious PDF — malware analysis report

Static analysis result for SHA-256 32edecb13b74fb5b…

MALICIOUS

PDF

76.1 KB Created: 2021-02-27 19:13:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dca0844cb8a1aae2eb4ce3c75af7e4ef SHA-1: 1c765d6890541b31851236cb0a9a60bfd04c9c08 SHA-256: 32edecb13b74fb5b13daeb3c3b3555e72e2ca114219890cf1e4341ea72a4843e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, many of which are part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of JavaScript, though not directly executed in this static analysis, suggests potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/wix?keyword=racing+games+apk+download+for+pc PDF link annotation
    • https://cdn.sqhk.co/joxonorapa/hgKr8ji/asteroids_coming_to_earth_july_2020.pdfIn PDF document text
    • http://shtangye.xyz/troy_bilt_self_propelled_mower_home_depotlbuo4.pdfIn PDF document text
    • http://aromaita.space/how_to_practice_for_sat_subject_testsplhi0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_602a4e103b900.pdfIn PDF document text
    • http://popularchoice.space/penidumivesid5vu.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/dumudopubame.pdfIn PDF document text
    • http://reduslimitalia.site/tom_clancy_jack_ryan_season_39dv51.pdfIn PDF document text
    • http://boevoenlp.com/raxotikoxamirabefonudobwwbdd.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/iJuiaif/clipping_plane_3ds_max.pdfIn PDF document text
    • https://cdn.sqhk.co/puroneruk/a6hhVEW/baby_growth_spurts_and_developmental_leaps.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/hiZn0gg/laxuxarusaredileroluwur.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/how_to_write_reflective_journal_example_childcare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/grounding_techniques_for_panic_disorder.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/fuvisazuravewupir.pdfIn PDF document text
    • http://bolirazebaf.myartsonline.com/niv_study_bible_fully_revised_edition_personal_size.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/arris_dg860a_reset.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_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 5640 bytes
SHA-256: 01e07ec20e8864fff7e6f92cb77fbb016053211cabe519fa192d47216e8ebf8b
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 10472 bytes
SHA-256: b1ef6ddf915241b9afcb8fcd78a5374b429c27770742aa65de8505d3858343c5

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