Malicious PDF — malware analysis report

Static analysis result for SHA-256 59128adaee207ac1…

MALICIOUS

PDF

83.2 KB Created: 2021-03-17 20:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d7a2cfa17515f0611b82d44e6d0fcb65 SHA-1: c3ab0c050e73ee146722a7d2f3a98746e65bc9ad SHA-256: 59128adaee207ac1944515a72a720b9fa629752759d0b6bf63e6406cb5ff4e1f
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 0.9998

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://pelibifir.ru/wix?keyword=weather+instruments+worksheet+pdf PDF link annotation
    • http://tapozifokun.mywebcommunity.org/jitogexedepon.pdfIn PDF document text
    • http://nawenelogasivur.22web.org/what_is_the_purpose_of_an_opinion_piece.pdfIn PDF document text
    • https://mogivara.weebly.com/uploads/1/3/2/7/132712472/9776880.pdfIn PDF document text
    • https://fatomokoke.weebly.com/uploads/1/3/4/0/134098041/4289284.pdfIn PDF document text
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/1371998.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/jdkagjP/stickman_archer_defense_game.pdfIn PDF document text
    • http://tuvijanavodena.22web.org/1988_bassett_crib_assembly_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/binebelezux/iengcwM/snake_worm_game_download_apk.pdfIn PDF document text
    • http://gerisekazaleg.22web.org/ruzumusibuxevenafamur.pdfIn PDF document text
    • http://ridikeni.iblogger.org/pitisagokuwas.pdfIn PDF document text
    • http://sikagez.22web.org/cisco_webex_control_hub_user_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titugol.atwebpages.com/beats_by_dr_dre_headphones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/754781b1-2a52-40a4-8136-edc45aa056bd/8275542294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/334571b5-5b71-472b-bb62-68a90878723c/61609988599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165416a6-d922-4e8e-8386-e69fca32ee34/49418800067.pdfIn PDF document text
    • http://pixafur.atwebpages.com/basic_electronics_symbols_and_functions.pdfIn PDF document text
    • http://donovebar.rf.gd/what_is_the_download_size_of_unity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2625d626-2419-48d1-9d9a-ec14e65cfb58/jugitalinubaguxuzuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e649cb-3dc0-4f9d-abf3-af2b2ad52bca/sarilonofakibalo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 5420 bytes
SHA-256: d8fd4dfd6414a9c80af550aec3b550086924440c7eaf882b133cbc280c521ba1
font_01_sfnt_off000102c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C6 11316 bytes
SHA-256: 1eee0faf58dcb6bcfb56bff9959212f8b103bc26ea09f85abf8eacb0c57bfbd4
font_02_sfnt_off0001299e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299E 16220 bytes
SHA-256: 08143b9bd47ec2a01f9c266964cb0c95038ada1473bcb5e011e8722cefb8e6bd

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