Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2b7ede5d1caf1a…

MALICIOUS

PDF

75.0 KB Created: 2021-04-05 11:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6d7460facd60e3d7673b892a4853ae93 SHA-1: 7278044389bee24b2effde633a2e2c05107cd8cf SHA-256: 0a2b7ede5d1caf1a82c21a86bd67277c9a56896607356e803048ffc80ee1cd84
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a malicious link farm. ClamAV detected the file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The document body, though heavily obfuscated, appears to contain text related to a recipe, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=bow+tie+pasta+salad+with+spinach PDF link annotation
    • https://cdn.sqhk.co/nuvexajamu/7idicmh/68342357870.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/iL39vic/95637208400.pdfIn PDF document text
    • http://creditscorefix.info/buell_xb12ss_owners_manual2v4v5.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/uqhh0jc/86750294162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_6039c6cfe00ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5fda07dc47e8d.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/gD4Cgjq/affitto_casinalbo_formigine.pdfIn PDF document text
    • http://zobebukore.22web.org/capacitor_bank_wiring_diagram.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5ff774f78974e.pdfIn PDF document text
    • http://geesecam.com/absolute_value_worksheets_kutaqpnqq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483336/normal_5fdb57a570c39.pdfIn PDF document text
    • http://xunajoza.22web.org/arithmetic_and_prealgebra.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a04f01a-7147-4793-98aa-b59dc93e6f96.filesusr.com/ugd/efcdeb_6c7aa8f1d7314c7e9a150f3bef2ac042.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e97786-1571-4797-9b15-0dd8f078e8f8/42749838702.pdfIn PDF document text
    • http://wekolutunumoze.rf.gd/cmake_tutorial_for_beginners.pdfIn PDF document text
    • http://tujolelulovowew.rf.gd/yamaha_clavinova_clp_560_manual.pdfIn PDF document text
    • https://69b12d55-863e-458e-a545-ad358ed6bd1a.filesusr.com/ugd/a9642c_65d51315181343caaa5d25020f365302.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f03c033-6293-44a6-bb21-3cfe58abf6d8/98689052518.pdfIn PDF document text
    • http://pezidojixu.rf.gd/nevada_learners_permit_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c882bc5-619a-40a6-9865-f474deb1119b/bowofilerozozipumumaz.pdfIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_e861a55a4e764bb3944ccaba37e954a4.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_9272f6afae904e5b8fcc77a398fb2941.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc18669d-4595-4226-a37d-68fcf33822cd/gunekexiwupesemulire.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_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 5208 bytes
SHA-256: 8b059129f284d6d23e095c64f0a26acac2c47dfda9b9087a5436a11a24516a0c
font_01_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 11212 bytes
SHA-256: e3c3fe3a88780d330d4bd37d1894b55c16bbee5c5c277e409fec12cbce3e209c

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