Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ecf65c28d21cd8…

MALICIOUS

PDF

88.0 KB Created: 2021-04-02 19:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c34c8fa951f1bbd8c68dada982b75441 SHA-1: 264a39392a7a662ee3262627f3f9a3e4d619b6e1 SHA-256: 00ecf65c28d21cd8b3f6684905a27c10d5fa18537b37d52cb776a31e1592860d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with at least one, 'https://maypoin.ru/award?keyword=alienista+caleb+carr+pdf', identified as a potential distribution point. The PDF's structure and the presence of external URIs suggest it's designed to redirect users to malicious content, likely for malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/award?keyword=alienista+caleb+carr+pdf PDF link annotation
    • http://kajuzumanaz.sportsontheweb.net/burnt_offerings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_604f089200f39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414498/normal_5fcd303fd2986.pdfIn PDF document text
    • http://wavewozokuxa.getenjoyment.net/kovipojig.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/stephen_kings_it_2017_full_movie_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/3lhdijM/fafafa_tm_gold_casino_free_slot_machines.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/biodata_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/RhemWFw/tajikowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_603064a417a6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470837/normal_5fff94ebadb68.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/what_is_the_main_purpose_of_lawyer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425921/normal_603b7a85bc18c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodonukebonona.epizy.com/how_to_model_operational_risk.pdfIn PDF document text
    • http://tufukupetateto.epizy.com/boogie_woogie_bugle_boy_piano_sheet_music.pdfIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_dda729c94ac04166a908f48a46ebba29.pdf?index=trueIn PDF document text
    • http://padegijogul.atwebpages.com/precalculus_with_limits_a_graphing_approach_6th_edition_online_textbook.pdfIn PDF document text
    • http://pogetowem.onlinewebshop.net/wuxuwuvekalimibikigun.pdfIn PDF document text
    • https://1ae094b9-110d-4377-a83c-911b29edd90d.filesusr.com/ugd/d5eada_766619c554884425a4151f87e7820d9d.pdf?index=trueIn PDF document text
    • http://zirutabu.myartsonline.com/75657291067.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_02238508467f42eca3c879d4ef2fe7c2.pdf?index=trueIn PDF document text
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_1876500a2c3741c487a062fd3348f21c.pdf?index=trueIn PDF document text
    • http://dexivovadoxexo.myartsonline.com/xosegataxekotikuw.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_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 5276 bytes
SHA-256: d7ea0cf2171c339b96c6fbb35f9a080ef11b1fec4d40e48cacbeedf1520c9797
font_01_sfnt_off00012c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C68 11228 bytes
SHA-256: 99ab26404ea8b3ad096c3b3678caf3bf8935b467cb363f885a60cdf6b8db5f30

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