Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fc84920a3372c6…

MALICIOUS

PDF

143.4 KB Created: 2021-03-15 05:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e4674ac33265d748dedaa25ca41c2dc8 SHA-1: 81b1cdf98e772db0b4a608b9035485c410783e96 SHA-256: 69fc84920a3372c624e904ca3d71af563b3dcff3cdd75f50dfdd5c9aae76c118
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The file contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain metadata related to a police log, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/strik?utm_term=raymond+nh+police+log+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389095/normal_602b50efca997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418579/normal_5ff12d1619678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5fe6cb1015ccc.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/9ahjvBh/zuwetogabiwima.pdfIn PDF document text
    • http://kadanijojabuf.mywebcommunity.org/95733068236.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/hggihe9/aqw_le_bot_8._4_mac.pdfIn PDF document text
    • http://3bki.ru/how_to_use_dyson_ball_accessoriesbsft1.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/girard_tankless_water_heater_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/xhiifh9/29835862273.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/PB5gfic/knife_hit_mod_apk_happymod.pdfIn PDF document text
    • http://armlur.space/14142472000cpb3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419826/normal_5ff88cd126bd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382958/normal_5fc7fd65276aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c4ccd4-b9a7-46ce-87a8-4d33425058c8/best_true_polymorph_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf4de37-bd29-476c-9453-6d1290dea83e/what_is_a_flowchart_in_project_management.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_37a8d0fbf2c545c1a4b27a4d14223e11.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_9af343edeb1442f692a94ecbb68fad3b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ee22bdb-c5b9-4e7e-b9f9-7bb311c02750/bengali_grammar_book_for_class_6.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_7f20fa2b019a4862ae17496e43d4c3dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/743508a2-5450-4d50-a60c-5ac06a22c6ca/what_is_the_strongest_volcano_in_the_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fe8f4b-2e71-4d9e-9dd7-3a1be2b4f58d/befexekimumi.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_off0001dd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD36 5804 bytes
SHA-256: 499fea7085bd46d80292d6737b0b35fc8e8f4736e7a571a5b5907736f54ca1c4
font_01_sfnt_off0001f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0F1 12368 bytes
SHA-256: 9c3b5be4d92a140dc248d4db3fe20dff1b4844215156d99dae25b293d9622ffa
font_02_sfnt_off00021ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21AD6 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330