Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc045a9426bf6b0…

MALICIOUS

PDF

65.3 KB Created: 2020-11-12 22:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5ac9482c66e74003d7f594a276d9a427 SHA-1: dbdc881ce86992abdb96816bff0b9b655374f71a SHA-256: 8cc045a9426bf6b0a7de66d5a13eff5f3869f0afeee3bd1c3564565bd6859ae5
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The embedded URL, 'https://trafffe.ru/strik?utm_term=lego+building+guide', suggests a phishing lure related to 'Lego building guide'. While no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate a likely attempt to redirect the user to a malicious site for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=lego+building+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5fa1db3e18ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f8b6004a3bd9.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/xetasif/sims_medieval_cheats_unlock_all_outfits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4044136-fec4-4f59-b55b-ea4bccf61416/airline_ticket_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/emotional_intelligence_theory_findings_and_implications.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/el_caso_de_cristo.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/basic_excel_file.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/area_circumference_radius_and_diameter_of_a_circle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/95655144584.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/baterixuduzul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91367ced-bdb4-4a2e-9397-f6f69cd38ae4/nasefu.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/avabel_rogue_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/86397690729.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_off0000b8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FD 4392 bytes
SHA-256: abf4d9bf38c30fbf0d662ab9dc036debbfcf975319a1a3a5edf06f2154fe54ae
font_01_sfnt_off0000c7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EF 10124 bytes
SHA-256: 002c2b3a3023e9a2cdd5bad99d9667a906cb8f4100756ba05a2b145b0a91c65b
font_02_sfnt_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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