Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeb128437a8a279…

MALICIOUS

PDF

66.5 KB Created: 2021-03-22 09:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3584bc409bce482eb4224508df5f67a9 SHA-1: fd3fd121966196a517cf26a99df60ecdce842d2b SHA-256: abeb128437a8a279f6e63a97943ce6373ad7dcd0a995bfea845cc31864a59081
124 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to host malicious content or redirect users to phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on low-reputation domains, a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9859

Heuristics 4

  • 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
  • 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/award?keyword=fascial+space+infection+pdf PDF link annotation
    • http://paktum.pro/vituvolitcyejd.pdfIn PDF document text
    • http://verifedform.com/8007426506323fvt.pdfIn PDF document text
    • http://vbnmcxz.xyz/chiraq_instrumental_free2ho99.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/what_are_the_six_fundamental_elements_found_in_living_organisms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416919/normal_601d20ffc18f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_5fe880eba46a7.pdfIn PDF document text
    • http://gatotekisuneraw.iblogger.org/holy_quran_translation_by_abdullah_yusuf_ali_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408593/normal_5fed119cb40a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_602fd0e5c68a3.pdfIn PDF document text
    • http://gufutaca5.xyz/80127725892n6rjp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_6022d0d4883dc.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/java_swing_mysql_connection_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/tirumajoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc3e450-d9ce-4b7a-8638-ca7a79ae6194/best_diaper_genie_for_dogs.pdfIn PDF document text
    • http://veruzixiki.rf.gd/56468521939.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/what_is_a_trust_uk_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2d1183-d386-4a14-a39c-bdf74c09e6ab/gotagodesamorowuduru.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/arcelormittal_south_africa_ltd_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7603ce8-ba88-40a3-be47-5331a3ba5109/how_to_use_firefly_vape.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/vajuwakagurerabumojek.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/xojedugipaxuzof.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF356 5008 bytes
SHA-256: e148cc93c7f38d36c879a83768a12004ffb72cc86d39f92131f63adef2d5883c

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