Malicious PDF — malware analysis report

Static analysis result for SHA-256 4470b023475e7b59…

MALICIOUS

PDF

68.0 KB Created: 2020-12-16 17:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5fa6dcdd1acd7675903d12ecac3ed2a SHA-1: 105e0a1e0c55d1c7f89893fc3d6f866ebe1631bc SHA-256: 4470b023475e7b599d5df19953dd66a08ddc330799af076569b4369dc333664d
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is highly suspicious. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffi.ru/strik?utm_term=real+skin+dildo
    • https://cdn-cms.f-static.net/uploads/4454684/normal_5fd2420a16631.pdf
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/guxasobupipole.pdf
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/7049136.pdf
    • https://zinibikilejob.weebly.com/uploads/1/3/4/8/134886520/a43e6cc.pdf
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/sobabewukoxa.pdf
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/6276797.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/susonanezaj/54738229861.pdf
    • https://uploads.strikinglycdn.com/files/fdc1eae0-5e82-457b-b1bb-ee0b8c276441/sweetbitter_soundtrack_season_2.pdf
    • https://uploads.strikinglycdn.com/files/d8bcf68b-3730-4957-9661-9220cb6e07d2/sample_graduation_letters_to_daughter.pdf
    • https://s3.amazonaws.com/sukedil/les_amplificateur_oprationnel.pdf
    • https://s3.amazonaws.com/muwomapotumugi/canadian_election_2019_ndp_platform.pdf
    • https://uploads.strikinglycdn.com/files/331027a6-72c8-4da1-84d6-5251a3e87d74/fubonibojezejukafubonati.pdf
    • https://uploads.strikinglycdn.com/files/03e6983d-18df-44f6-975a-e8f36bc106c5/80208564992.pdf
    • https://uploads.strikinglycdn.com/files/d192a51a-74c3-4a35-830a-837deb0257ed/pimafafoxoga.pdf
    • https://s3.amazonaws.com/dobesogum/supersize_vs_superskinny_host.pdf
    • https://uploads.strikinglycdn.com/files/b33e4b95-f7e4-4017-9895-13e7eb0dba7b/scrooge_mcduck_comics_images.pdf
    • https://uploads.strikinglycdn.com/files/cf8ea908-8272-4a8f-ae6e-e5c5a5c86b3f/43118464887.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf96.bin
2f9a3faefbcc84c3ef5762a1f8937a598549dec382e0be342cd42f6376b8fa0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 4792 bytes
font_01_sfnt_off0000dffa.bin
9f97bce56e19e1f52162f1dd448d5cbc2dbdd7b3db9425e6ab9013aad00bb1e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 10412 bytes