Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfcdbd4530aa274…

MALICIOUS

PDF

67.1 KB Created: 2021-02-15 04:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f342d264d4d621307ba5b2c2838f8de SHA-1: 2d70a40da76ecf2b375bb33406d6e5cc2edd5457 SHA-256: bcfcdbd4530aa27423e4efcf61393c3d34d8a354d40eebf70ae5162fa9413e81
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://leonvi.ru/123?utm_term=molar+mass+of+%2528co3%25293', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful content.

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://leonvi.ru/123?utm_term=molar+mass+of+%2528co3%25293 PDF link annotation
    • https://cdn.sqhk.co/dakuwuwuzije/mhcrhh0/london_travel_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/3uYdhem/merumakagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_6010efff71438.pdfIn PDF document text
    • https://cdn.sqhk.co/molewekane/ijiwgiC/cbbc_magic_mansion_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hiP2tog/cnc_router_machine_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/ggMiegf/call_of_mini_zombies_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/Mjhjijg/43685430097.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/hiFjgMg/ups_golden_valley_minnesota.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/gieO9gf/kedosufegaxafibaledilozem.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/3cOjj4U/stickman_legends_shadow_wars_2_mod_apk.pdfIn PDF document text
    • http://pressit.space/satuxubuvotomowkap0.pdfIn PDF document text
    • https://cdn.sqhk.co/lalamiteliw/8jhgeUy/65214437552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_60255e04b7816.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/ejak1jb/dare_you_to_move.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_off0000c7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FF 5352 bytes
SHA-256: 38cc34e607d5b1c50c21d445bdb937441168c7f9877defbca5bcc8d613fa3ae4
font_01_sfnt_off0000da34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA34 10792 bytes
SHA-256: d335a3db8b0ad85dc802cab217963ce9d050c95815f992d5cf1010028cf67ba8