Malicious PDF — malware analysis report

Static analysis result for SHA-256 643c2b92e1346258…

MALICIOUS

PDF

89.9 KB Created: 2021-04-07 05:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 299e0c6e242919430e3ad2280b4ba848 SHA-1: 743a1638c0e3777906dd8089a6f63f7b9fff56d7 SHA-256: 643c2b92e134625834850e9a0eb1e2160f9fb9803229dcaff4ba339b984fcaef
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 0.9996

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://baarspo.ru/award?keyword=carmina+burana+partition+piano+pdf PDF link annotation
    • https://cdn.sqhk.co/fuzomorikat/Vjelj5R/3d_car_racing_games_for_java.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443814/normal_6003768acf3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_606a8071e3e91.pdfIn PDF document text
    • http://jitokinut.iblogger.org/the_tragedy_of_macbeth_act_1_selection_test_answer_key.pdfIn PDF document text
    • https://beburasitowetu.weebly.com/uploads/1/3/0/9/130969608/ripubadabeg-besivef-vubewem-tivakimijofa.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/2a3b3b024.pdfIn PDF document text
    • http://maslovauto.ru/how_to_clean_a_poulan_chainsawh3px8.pdfIn PDF document text
    • https://xusisuzonetov.weebly.com/uploads/1/3/1/4/131456320/dexibebida.pdfIn PDF document text
    • https://cdn.sqhk.co/vebapejun/AJpiiVR/ncaa_soccer_national_championship_2019.pdfIn PDF document text
    • https://ferijivoko.weebly.com/uploads/1/3/5/3/135327637/puzofojibe.pdfIn PDF document text
    • http://hristogrigorov.com/357167202525b6wa.pdfIn PDF document text
    • https://tumozoredupoki.weebly.com/uploads/1/3/0/9/130969837/4b9f0bf35af.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/jgehaji/43760366205.pdfIn PDF document text
    • http://blue-tick-central.com/50745112528skds1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_6039e5b9a01e7.pdfIn PDF document text
    • http://cyberghost.store/821573672931fil0.pdfIn PDF document text
    • http://7lessons.website/wiban6uxop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovaner.rf.gd/casio_aw-80-1a2ves_manual.pdfIn PDF document text
    • http://ditaloted.epizy.com/what_does_activating_prior_knowledge_mean.pdfIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_9a6c9a500bc3400399172c8a9a7eb170.pdf?index=trueIn PDF document text
    • http://xutugaveteselul.epizy.com/fozizametok.pdfIn PDF document text
    • https://de461234-8179-4892-b46d-67dc01ae00af.filesusr.com/ugd/69bbc5_700f5a14f27547f4a02d93e6ea14ace9.pdf?index=trueIn 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_off00011fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCB 5024 bytes
SHA-256: 72354b499c9544fe3daed68aabbb95033a5f3cfab60c7358ab8005251ed598dc
font_01_sfnt_off000130c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C0 12524 bytes
SHA-256: 1cf917e6184a9a56c8a54ec954d4a024a9e49152afb90474aa7829324f4eef73

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