Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97189dd3c780bb2…

MALICIOUS

PDF

72.1 KB Created: 2021-02-12 21:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6ee5f55c3c2f9334b4b7499647a97c6f SHA-1: 7ce47d7f549f82b10ca94f40c48edaeaa066e720 SHA-256: a97189dd3c780bb225f69e4116f59e888c0fcf39931044ed9a6263779087d635
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, and is identified as a link farm designed to redirect users to potentially harmful content. The document body, though heavily garbled, contains strings related to game mods and application downloads, suggesting a lure for users seeking such content.

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://druttle.ru/123?utm_term=last+day+rules+survival+mod+apk+free+craft PDF link annotation
    • http://efarbok.xyz/mistake_on_my_credit_reportwkitr.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/iFwWrja/world_conqueror_4_modern_war_1.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/pijupuf_pigikakegixu_zotopof.pdfIn PDF document text
    • https://dudulisatosix.weebly.com/uploads/1/3/1/6/131637211/jufowukobejoni.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/gdjhii4/yellow_craft_for_kindergarten.pdfIn PDF document text
    • http://mowuvivof.22web.org/37141904166.pdfIn PDF document text
    • http://trenolgia.buzz/91597218765nsino.pdfIn PDF document text
    • http://burrrhey.tech/call_of_cthulhu_7e_keeper_rulebook_p8nn82.pdfIn PDF document text
    • https://bagibobujinokat.weebly.com/uploads/1/3/5/3/135312275/lodizuxedap_pawijefu_rifuri.pdfIn PDF document text
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/depes_kawun_xiluteguzow.pdfIn PDF document text
    • http://francobusiness.com/action_plan_for_employee_improvement_templaterq5jp.pdfIn PDF document text
    • https://venireza.weebly.com/uploads/1/3/5/9/135959939/betetusabif_bosisidonidepo_nexeturibexok.pdfIn PDF document text
    • http://jusapp.club/making_history_runescape_quick_guideeka74.pdfIn PDF document text
    • http://reduslim-shop.website/kusuregxubo.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/TAjbjjv/11771730259.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/takurugilij/30948899733.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/dirizadadulaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/83002452104.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/bit_torent._com_free_for_windows_xp.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_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 5468 bytes
SHA-256: 3c4a5168d849fb4edaa0162d8afb13aac6cb51f3e714d10e74e3a39cd95a43a4
font_01_sfnt_off0000eec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC8 10616 bytes
SHA-256: 616e19357f29ae64787605aaf0282a6d8810b1442c7c4bd931618a2cb9a39e66

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