Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8754a9c7abb74f…

MALICIOUS

PDF

67.5 KB Created: 2021-01-14 00:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 858c961f4331b6cf27a95d08260ca71e SHA-1: 93ec1423f7b3827f9bcf967031c99bc116c3ba41 SHA-256: ce8754a9c7abb74feaf21e9130d2eba36d257cdfc77961cc030c677852fd2c3f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The primary URL identified is https://trafffe.ru/123?utm_term=sejpme+1+study+guide, which appears to be part of this scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffe.ru/123?utm_term=sejpme+1+study+guide PDF link annotation
    • https://cdn.sqhk.co/vuwonesi/4hjoGNc/bojokasuvafamupima.pdfIn PDF document text
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/loxiritubujufafege.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/pekewu-pedufajib-beloduleduzezo.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/ifgeeji/juvarixarutomabek.pdfIn PDF document text
    • https://cdn.sqhk.co/tigufarejeti/UDesheK/where_s_my_water_game_unblocked.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/73179efb5.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/3892c252b9.pdfIn PDF document text
    • https://winimotewo.weebly.com/uploads/1/3/4/5/134593518/tovoxeveleru.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/zasexizidarusup_magisen_ledimosunolara.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/jcuy7gA/4415813884.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/pidufozu/pusodisakeluren.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/the_descendants_3_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/dead_awake_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/jelos.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/vitemo.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/red_cheerleading_uniforms_for_sale.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5E 5276 bytes
SHA-256: 213a10a6672b34a9737e05b49e588b1522a0bcbcae7c6aebba64acc343472205
font_01_sfnt_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 9844 bytes
SHA-256: cfe9ec2eddc28190e0662cd873e3160e13fd76a8bf728e04fa0fcfe51dea35b1

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