Malicious PDF — malware analysis report

Static analysis result for SHA-256 091c62640bb07ad1…

MALICIOUS

PDF

71.4 KB Created: 2021-06-11 02:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 73d9fb042a6e4d15fe0c183dc20d8fdd SHA-1: ae7c4558a41ac29f93058f172571d4e06e0c4681 SHA-256: 091c62640bb07ad18c260a6ebe7bc1b59db340dd9b927376fd431b66b94f650b
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 are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://krisoc.ru/pbw?utm_term=channels+on+live+net+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474734/normal_5fdfcdeec72c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_6015fc2d0f151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_6047036e3039e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453740/normal_5fd73b18c0355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_604f7ac8de7aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465930/normal_5ff465e8e4ff5.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4387816/normal_60afe8727d7ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485810/normal_6020a3a6cbbe7.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4371004/normal_60b4c0f73c69e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zelovoguvunu.pbworks.com/f/61056543081.pdfIn PDF document text
    • http://kimiwodevus.pbworks.com/f/agam_tantra_in_bengali_free_download.pdfIn PDF document text
    • http://bokibagaror.pbworks.com/f/how_to_use_rowenta_xcel_steamer.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144425181/how_to_fix_keyboard_keys_typing_wrong_characters_-_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc11b7c-d112-4a47-ad3d-197d652d51df/depoxagatozol.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144617367/pit_boss_smoker_guide.pdfIn PDF document text
    • http://tinigogazos.pbworks.com/f/9950054274.pdfIn PDF document text
    • http://fuvesiwowegu.pbworks.com/f/dopumef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a183dcef-0e77-412b-9afd-f6876e737290/cyberlink_powerdirector_15_pip_tutorial.pdfIn PDF document text
    • http://nutafojijoki.pbworks.com/f/5762128937.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144558753/where_to_put_arrow_of_light_patch_on_boy_scout_uniform.pdfIn PDF document text
    • http://wevapejatu.pbworks.com/f/it_director_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155e24af-567f-4775-ad6d-ab468ff78322/komituselefiroboto.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_off0000dbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD1 4644 bytes
SHA-256: 7fb2d0d76debde034813fa1e6eac779fa78139df12c32ca3ff18e79c7fe94241
font_01_sfnt_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 10892 bytes
SHA-256: 2242c37c067b2ce779a839ada20b402828a0f598f93bf44f99dcc5d272ef835d

Open this report in the interactive analyzer, or submit your own file for analysis.