Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1ea38e891bcb35…

MALICIOUS

PDF

81.1 KB Created: 2021-06-02 17:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a2b34649dd5f9f323b278b3ce8674a96 SHA-1: 161aa30069b0da908f0a2dc7e938aeedf1360d1f SHA-256: 9f1ea38e891bcb353abe4f8a0c1361ad2bc5a2823983f012c181f5392220f59c
166 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. The presence of numerous external URIs, including one pointing to 'botokaw.ru', suggests the document is part of a link farm designed to redirect users to malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://botokaw.ru/123?utm_term=roadrunner+app+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385014/normal_6046516e740bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476567/normal_602db1464cacb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492897/normal_6034f8c97fb5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451025/normal_5fe0fd28ed6b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_6044d3478eca6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5fcecdcb90e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498978/normal_606e27b4a3f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_6061f7fa0d993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_604dc2165be51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_6023a0354998a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144411441/how_to_write_a_break_even_analysis.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144428085/winrar_password_unlocker_online_free_download.pdfIn PDF document text
    • http://pimepovume.pbworks.com/f/poulan_pro_42cc_chainsaw_fuel_line_replacement.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144485382/how_much_is_shaun_cassidy_worth.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/w/file/fetch/144499281/94093413946.pdfIn PDF document text
    • http://tarogifere.pbworks.com/w/file/fetch/144489069/how_to_download_gta_5_apk_obb_on_android_ios.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/47925387742.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/28106939969.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144512664/how_to_create_a_branch_in_github_repo.pdfIn PDF document text
    • http://veniwusuj.pbworks.com/f/how_to_store_raw_meat_in_freezer_without_plastic.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/32596581389.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_off000100c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C4 4752 bytes
SHA-256: 61dba0a5179484617c925dcb0982e6d7a16347f227ac847d7065fb1cf32039dc
font_01_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 11172 bytes
SHA-256: 7c6afbed783ada3d6f85c9b9ecf403781a86ab9c9adb01314268266b2c58e2e1

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