Malicious PDF — malware analysis report

Static analysis result for SHA-256 faecc4d128babe1d…

MALICIOUS

PDF

69.9 KB Created: 2021-04-03 04:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f5d51a9483e078ed121c607ab9de46e1 SHA-1: 7397d9172be15aa9ba2ee5c7680d7ba7312bc8ab SHA-256: faecc4d128babe1dab6688229c21bddf0c0b922dadb444d4cd4dd8db4f23a322
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The document body, though heavily obfuscated, suggests a lure related to game cheats, which is a common tactic for phishing or malware delivery. The presence of numerous external URIs and link farm characteristics further indicate malicious intent.

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://xezojetit.ru/strik?utm_term=blood+bowl+2+level+up+cheat PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5ff2e8d0512b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450036/normal_5ff41e9d2e1b7.pdfIn PDF document text
    • http://netewe5.xyz/faceing_math_geometry_lesson_2_answer_key7d2w2.pdfIn PDF document text
    • http://tertov.xyz/jj_lin_lyrics_na_xieb1xld.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/present_simple_adverbs_of_frequency_exercises.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_5fd87c98ee249.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499984/normal_5feccfba9ea4a.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/jhnWhfD/70131054237.pdfIn PDF document text
    • http://contact-git.top/84383835905epka9.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/bVibigg/trickshot_games_sniper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5fd9af9d15857.pdfIn PDF document text
    • http://namabal.scienceontheweb.net/medical_fitness_certificate_template.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/0bcb3cd9-a3fc-491f-ae22-5cf17ab42006/16304808121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dbedddd-6854-4d69-9edc-84d02daa25b1/metal_gear_solid_4_remastered_for_ps4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2df586-c186-41dd-85ce-5362075dc893/sas_ods_rtf_word_style_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdd50df-d9dd-4759-9d00-76e65958eac6/learn_how_to_trade_penny_stocks_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33de9cab-14ef-4e9f-a896-fe2f5340da76/how_to_reset_onkyo_tx-nr636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b74532-4b1a-4d8f-9d1f-ea12f5929e22/graco_lauren_crib_replacement_hardware.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_off0000d42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42B 5360 bytes
SHA-256: ad622b212b1044f517217a2e82e9338c9941b254b562a322ef69e8f3fb0b3475
font_01_sfnt_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 10648 bytes
SHA-256: 1d88599daefde4e43cc3fb72790f7b73e754d0743398ee99074fa6e92b0b78d1

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