Malicious PDF — malware analysis report

Static analysis result for SHA-256 3229b381f72400cd…

MALICIOUS

PDF

116.7 KB Created: 2021-03-18 23:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a38631636331a3f61a9c343cbd78f160 SHA-1: 5301272cef9f8c87a630a730f6a8a2b9f311841a SHA-256: 3229b381f72400cd15ff15e25cd3f6c79670c5d123c422a9bb0655283c30e455
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 0.9993

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://maypoin.ru/award?keyword=brave+new+world+revisited+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501501/normal_6019bdc78b805.pdfIn PDF document text
    • http://qupieasy.online/hinge_girl_answersynjpz.pdfIn PDF document text
    • http://getliterate.online/53254678805vq75q.pdfIn PDF document text
    • http://s7hmus.org/ice_cream_truck_song_lyricsm12eu.pdfIn PDF document text
    • http://itali-big.space/they_say_i_say_chapter_5_exercise_1_and_22q9lr.pdfIn PDF document text
    • http://reawolt.online/phalogenics_method_free6v6o9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475389/normal_5ff3f3ee5e972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_6020a8d8b3220.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe15301c610f.pdfIn PDF document text
    • http://autocredit.moscow/japopilinogivibezejm1l1g.pdfIn PDF document text
    • http://gachihyper.xyz/643857272716sobv.pdfIn PDF document text
    • http://timecodes.net/404830804135hg61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447626/normal_5ff66d61ab8a0.pdfIn PDF document text
    • http://casbah2point0.com/48130227766iboza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/kajewudukid.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/android_4._4._2_delete_google_account.pdfIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_689f944bd7624f4498fedf33d3658596.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/76254738980.pdfIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_bdbff275ff41420ab4f41ecc19b56c33.pdf?index=trueIn PDF document text
    • http://nomulumipal.rf.gd/78727866707.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_cf663cceeb764decbb9535f8f54c9d63.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_e3b95062dcb342d2a13c5497825c524b.pdf?index=trueIn PDF document text
    • http://pusevim.epizy.com/does_mentos_gum_have_gluten.pdfIn PDF document text
    • http://palowok.epizy.com/how_to_download_teach_your_monster_to_read.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_off00018a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A4C 5236 bytes
SHA-256: d350da7f5bb251ad738c6a336f9b6cf8acd2be3c8af2233f60001047684028e7
font_01_sfnt_off00019c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C3F 12584 bytes
SHA-256: 778287e65f3ad8155a2b73ede51d3688dba34868c9959ad2c59c102234f11217

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