Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a751b0c5bd67692…

MALICIOUS

PDF

110.2 KB Created: 2020-12-23 09:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4503f9bb74f305e1eafd6843c625a9b2 SHA-1: bb497bf923703778f4c26cea13fa6e7f5bc504f1 SHA-256: 6a751b0c5bd676920506b1c7f4dedb5ae2e6ac5f5852c60c42ba5be4f7f6bafa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, with a critical heuristic identifying it as a potential link farm. One of the primary external URIs points to 'traffset.ru', which is suspicious and likely part of a malicious campaign. While the document body is heavily obfuscated, the presence of numerous links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=doom+eternal+dlc+release+date+uk PDF link annotation
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/sizaku.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://s3.amazonaws.com/kawotexulozax/venarumopid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3789f084698658e6e9449/t/5fc64cc43f75b16643aa9341/1606831301636/w3schools_javascript_callback_function.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce5f902ebf7d3ac6464c08/t/5fd6d41096ed101a3e51e3b9/1607914512656/39393179628.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49dea97599144eed7606/1606371819877/fifa_mobile_apk_obb_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/manual_choke_on_carb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce509df32955146e10cd7a/t/5fd1b1b3eeaf2774ac8b6af8/1607578035928/lowest_flight_fare_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/train_simulator_2020_m2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9450e71b-5c6a-4796-b9b1-6305a790b8da/tale_of_despereaux_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e13b6d0-1974-4959-96d6-d710aed1a7c1/voturag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a90c665f-8b2e-42d7-b8ed-75627c5186ad/28_weeks_later_movie_download_in_hin.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/guzuzefalelopovo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c9115e8e827d42af5a10/t/5fd057fd125f6a657a4ac15e/1607489533881/23204263323.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb84616306c7603b6accb/t/5fdd25c653f07353dd5373cb/1608328647356/nobel_biocare_abutment_torque_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e90c27a199023ab56552/t/5fc21a9718e72e5fdb1fd233/1606556322467/4667365712.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_off0001642a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642A 4984 bytes
SHA-256: 85c766182a3fd18ffb3fdcb2b2d02f3ab9ba581b37b91910bb0caf178cee0118
font_01_sfnt_off00017501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17501 12004 bytes
SHA-256: 1b32559e324f0155c37e0bd9aa8a24c4248ffd185bb81d0ab8400ee7942d2a4a
font_02_sfnt_off00019d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D70 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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