Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f125377b1b8fab…

MALICIOUS

PDF

80.4 KB Created: 2021-02-17 00:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cf7bc2a9b8263878c9b765b5a3dba847 SHA-1: 54390a83dc726de17de08d817fdb4a412f7e1f91 SHA-256: 17f125377b1b8fabf125eb3a200eeacc7d62023b6180b5e888130b37042238e9
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm. The document body, though heavily obfuscated, appears to reference Windows commands, and the 'SE_CLICKFIX' heuristic indicates it instructs the user to run commands. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick users into believing they need a password for an archive, a common tactic to hide malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/strik?utm_term=list+of+all+important+run+commands+for+windows PDF link annotation
    • https://cdn.sqhk.co/mugejufunij/gcjaAdX/volejisedinewipo.pdfIn PDF document text
    • https://xegugunozom.weebly.com/uploads/1/3/1/4/131482992/1725920.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/BheQRZa/world_history_definition.pdfIn PDF document text
    • https://gavufiwi.weebly.com/uploads/1/3/0/7/130775220/vomamivejofuvig-duzorojup.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/iemWpig/xikezigenoluvasanonufomev.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/gi9lflc/sage_my_assistant_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/ihgdHeG/quad_squad_scandal.pdfIn PDF document text
    • https://cdn.sqhk.co/duwutawuna/Wchd6gf/calendar_template_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/ehnhjgj/risusexetikopagu.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/3d48c.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/ISigkjh/mini_golf_challenge_app.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/8530550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavijirodujozi.rf.gd/beta_marine_50_manual.pdfIn PDF document text
    • http://palakojum.rf.gd/gender_ideas_interactions_institutions_chapter_8_summary.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_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 5336 bytes
SHA-256: 571896fbd1d549f7dac9173c414babb271659f5058856aa17fe9b418595984b5
font_01_sfnt_off00010c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2B 12484 bytes
SHA-256: ca3fb18452f9b6f111b7b4ad86f81d7280b8b0949c9cd0bae2b7120665c9f9ef

Open this report in the interactive analyzer, or submit your own file for analysis.