Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d1c6293ea5d873…

MALICIOUS

PDF

64.4 KB Created: 2021-04-01 10:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3fbe4e4998a4a4e910bb791b496acda7 SHA-1: c04aad1d49045da9b75d8bed13330ec55b20ca02 SHA-256: d3d1c6293ea5d873af8c5d702c2dd1e1fb5909131e4e036076d727af537983fd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that leads to a URL designed to trick the user into downloading another PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's part of a phishing campaign.

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://xajibur.ru/award?keyword=co2+welding+machine+specification+pdf PDF link annotation
    • http://xozonline.ru/dutukakuludev508us.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/prgfjhg/54783347724.pdfIn PDF document text
    • http://copyrightviolationcenters.com/can_anyone_join_the_canadian_armyw8wh7.pdfIn PDF document text
    • http://eglo.club/skywalker_trampoline_12_net48yi3.pdfIn PDF document text
    • http://apelsins.space/89017185312qy5fe.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/sjcovhc/55477487216.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/kyijA1O/10817655905.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/MgfiaDV/desiwa.pdfIn PDF document text
    • http://vinograd.io/wings_of_fire_book_12_audiobookj7fuo.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/iiTjfx7/automata_sentence_definition.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/widuxade/22813979324.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/19687609521.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/9911884739.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/12176069611.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/lopokuvep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5bfeb6-ccc6-4af3-b0f3-7ab3101f9a43/what_properties_does_table_salt_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490e10e4-c90e-4931-a662-34e0b8718e85/46991625124.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_off0000bfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBF 5600 bytes
SHA-256: ed13777cd7198dd4fcf8fb6a612e7b5e00dba924dc0aa038399a50a03a6bb127
font_01_sfnt_off0000d2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 10056 bytes
SHA-256: fea1b7cc83218b2d594246f7339759d8663160fb8bc74ddbe731a76beea36930

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