Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8357325be00a57…

MALICIOUS

PDF

81.1 KB Created: 2021-03-20 14:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3f781a7df4faa86b69241ee6745d0e25 SHA-1: 7ba57631a6bcfdfddc52f3e5d25cc505aea75e67 SHA-256: 6d8357325be00a57ca6e50305f5338836a354e08e307799d67625107e4d4a2a1
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

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://maypoin.ru/strik?utm_term=financial+modelling+excel+course+free PDF link annotation
    • https://cdn.sqhk.co/raxipopu/m5gi4he/the_art_of_blizzard_entertainment.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/ohjWhbr/hello_dolly_movie_poster.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/massey_ferguson_parts_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pavuraxutem/RDibfwc/43459584561.pdfIn PDF document text
    • https://cdn.sqhk.co/kerikone/ij7ijhc/superstar_life_play_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/h79bgfo/96778438403.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/fhhhlmB/recarga_cubacel_ding.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/lovetijif/misarupogise.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/xojofudogajope.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/how_grid-_template-_areas_works.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/makesobu.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/51426843546.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/how_do_you_build_a_multi_story_building.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/ordering_integers_and_other_rational_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/jobs_for_acca_in_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/78132143611.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/what_is_a_2009_bmw_328i_worth.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_off0000ff01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 5364 bytes
SHA-256: 834cc672f81a2c7f50f498cc83baecf1b554ab81c14e1db64beb3222ee2db3a1
font_01_sfnt_off0001112f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112F 11132 bytes
SHA-256: 0e989e9d8b4f4a1a022812c0379d0b78746bee2c88705bb37e2cd885f1542d72

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