Malicious PDF — malware analysis report

Static analysis result for SHA-256 31fa260a35b038fb…

MALICIOUS

PDF

85.2 KB Created: 2021-03-18 06:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4c0e0bb090cac56a30eff6f2baef3c2e SHA-1: 8b647aeae9ebcf9bf91cefc76f8fb2d678241ea1 SHA-256: 31fa260a35b038fb7d71c85ec8c280c1f4e49c0b564f10617b3179f7e50e610d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. The document body, though heavily corrupted, contains text suggesting a deceptive lure related to sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=cia+assassination+training+manual+pdf PDF link annotation
    • http://com-signto5.xyz/99010365601nrm9v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426690/normal_6035cc0276f29.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/atal_pension_yojana_application_form.pdfIn PDF document text
    • http://pc-remont.website/how_to_setup_logitech_extreme_3d_pro_for_war_thunderauf5i.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/o_mio_babbino_caro_lower_keyt1ccw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_60491ed33b2f0.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/piwegubokivifetexokirila.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/99300164339.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/basic_antenna_parameters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386609/normal_5fffc6c6c6f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_5fda4a2fe9fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417999/normal_60011e374b0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_603626f65745f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5fda27fd1b4c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fcd53f98ecc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_601d92135893f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365661/normal_5fc9dbb3e54a1.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/ritoma/athanasius_kircher.pdfIn PDF document text
    • http://wadusobu.rf.gd/65332480597.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/spalding_48_polycarbonate_portable_basketball_system_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/janazomevamazasikebetefi.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/61339698733.pdfIn PDF document text
    • http://padubarejibuso.rf.gd/11381091646.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/zufejulenutara.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_off00011099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 5268 bytes
SHA-256: 3fa90e09a0429448298aae1af1bd471a393e5545504a8b39b8585b633906109e
font_01_sfnt_off0001226b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226B 10620 bytes
SHA-256: 98f56bb49d5a72d2c85b2190ce676fd63a12cf3e23abb6e2a3612042e13c79c1

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