Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f65e74e923efe0…

MALICIOUS

PDF

186.1 KB Created: 2020-11-14 22:30:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d6ec52c1785d0887ceaad72225d27e6d SHA-1: b497ea8f0ea5b3baaabba77160bfc39c6406d1d8 SHA-256: b1f65e74e923efe077dfa6a1ad43d3217e2c878ed5c236f9968ff024669b6e77
126 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, with one prominent URL pointing to 'trafftec.ru', suggesting a redirection to a malicious site. The document body, though heavily obfuscated, contains references that could be interpreted as lures.

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://trafftec.ru/strik?utm_term=tomb+of+annihilation+guide PDF link annotation
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/karilikalim_pasixuzamozib_vobosekipepele_lixirilajuvi.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/josonose-webetusixaradiw-vetezusig-riwejos.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/4690111.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/a16a30452a4.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/572334.pdfIn PDF document text
    • https://suneminus.weebly.com/uploads/1/3/4/5/134529318/jinokuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448323/normal_5f9e3ef3b827c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373782/normal_5fa3bacc23de1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/37f5bdb5-f2a7-4211-a8fc-44dc29d5a595/72961282756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3db3568-747d-4f3b-9d0e-cecc50a51dc1/12391945541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa50b73f-1ef3-4ca1-802f-7e2c1d91ee49/23909434453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48f52cf-8abd-46da-b5b4-e65368b2e44f/dosirilurinenoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/alkaline_and_acidic_food_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/736390fd-6be2-4674-aa1d-f1200b64dcbf/tasipoperigifawipir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bf08de-5b11-4960-b420-d8163390f310/patrimonio_cultural_y_natural_de_mexico.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29683 5016 bytes
SHA-256: da19f2667c3fb6133fee8f20366d33119cc9a174de9b7a905422583341321680
font_01_sfnt_off0002a761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A761 10828 bytes
SHA-256: f01a71380f99384bb85fe7c21c42f1ce237b691a4b5164acd6672b5e30f5680a
font_02_sfnt_off0002cc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC48 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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