Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca10215f75b31d31…

MALICIOUS

PDF

75.6 KB Created: 2021-03-24 23:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 05da4860790de30f763b91a4cdab17a6 SHA-1: 7c16c05c0d2ef6333f6100173d2b6f459cd84446 SHA-256: ca10215f75b31d314b0b7ddcfaedf48bebf7b6889d1593019214bd025f56b85c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, suggests a lure related to business or technical information, aligning with common phishing 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://jacksth.ru/strik?utm_term=how+to+calculate+variable+costing+unit+product+cost PDF link annotation
    • https://cdn.sqhk.co/kopilixa/1xidwjh/furniture_mod_for_minecraft_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fd6376c14050.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/hgijpjh/fruit_cutter_game_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_6025c509b1aee.pdfIn PDF document text
    • https://cdn.sqhk.co/goponebegor/iJEIQaz/92566116706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fd2eabf7f31c.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/HgjTOgg/on_my_block_cast_ages_jamal.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/3jaheD3/duxotesugadem.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/YzFjcgf/xbox_one_controller_driver_update.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/jahhNjh/wazokugaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474736/normal_602a2ca9e285d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481161/normal_5fe1889b40d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_5fe9dd81d839d.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/rYFFFjb/didion_play_it_as_it_lays.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/c3ibYnT/nolopinoduliwafefoga.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/AibAchc/slots_free_play_no_deposit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374522/normal_5fee1c52da89e.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/id5Lhhv/zajamuzugejeloluzibite.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/DDjgcic/11130448963.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DE 5492 bytes
SHA-256: b29d0b1415965ee00cb1e28ca65b22896e2fa2a328bbd270671b66fe92f1b6f5
font_01_sfnt_off0000fba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA6 10124 bytes
SHA-256: e99607098807844d2844a41bbbb44e5fb5025dc117f5c6fa6e13827b8578ace8

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