Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3f3abac9937ffd…

MALICIOUS

PDF

80.0 KB Created: 2021-03-04 14:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8c5b7932053f83390cd8ef5dab334bd2 SHA-1: e35002b722a908e3486167b0667aed3f37dd3fc0 SHA-256: dd3f3abac9937ffde4d0637a8d7dea8285437421abb4ddb7a172b8a062a29595
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The presence of external URIs and the heuristic for link farms suggest the primary goal is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=world+political+map+blank PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fe1ca5bcb350.pdfIn PDF document text
    • http://electrumwallet.buzz/64243226799w14yw.pdfIn PDF document text
    • http://tublitalia.space/what_grade_level_is_the_trumpet_of_the_swanxs6kk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_602ce8ff15545.pdfIn PDF document text
    • http://magnetfix.store/sci_hub_books7rwl9.pdfIn PDF document text
    • http://chestlune.online/nisumizaf9zxp.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/3hdgfjd/naturalizer_promo_code_50_off.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/iDH4HFJ/arena_cobra_goggles_review.pdfIn PDF document text
    • http://vidclips.design/scrabble_word_finder_uk_dictionarygmwi0.pdfIn PDF document text
    • http://glossywp.online/jomanexevijufenororemosifro2b.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/DKZibvR/zogeziret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_601e429e0aefd.pdfIn PDF document text
    • http://uanews.website/vande_mataram_old_song_pagalworldsdx6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5fd26c54e8ce0.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/zhaM0mL/niti_aayog_sustainable_development_goals_agenda_2030.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/Ajchehg/x_plane_10_mobile_flight_simulator_android.pdfIn PDF document text
    • http://useplafond.xyz/a_feast_for_crows_chapter_294241w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419413/normal_5fd9a3dec5bef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_99990a336f49458ebd76acfa909c2bdb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f7388e-ae04-4e17-a3c0-94832322abe9/99757724474.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_80ea6b7cae324dc689957d6418254df6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a5ff3e-e144-42bf-abf9-e21588d6ef2b/32299128275.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_a5f448b581b1440aa81aa2339d634de2.pdf?index=trueIn 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_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 5256 bytes
SHA-256: 53d2d970d49133cc75f156e711e2c919fa75d44bf8bc3d088bf93c1926f64338
font_01_sfnt_off00010af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF3 11688 bytes
SHA-256: 0938d13b1895b4fc1445aa4b452680a7a01512979ea238b3f40dedca7bd6d4a7

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