Malicious PDF — malware analysis report

Static analysis result for SHA-256 94531be4b07e25bd…

MALICIOUS

PDF

66.8 KB Created: 2020-12-21 16:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfbfadc75271e5fb146e7c5f5252b2d5 SHA-1: 78721b4e369f0c5569e310cb648cdf138f22c666 SHA-256: 94531be4b07e25bdb4625cea17f979c0d46175587175e0374414456eadddcb1d
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The presence of numerous external links, including one to 'traffset.ru', suggests a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to trick the user into interacting with these links, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://traffset.ru/strik?utm_term=mechanics+cooperative+bank+routing+number
    • https://jiluzeros.weebly.com/uploads/1/3/4/3/134365673/kalid.pdf
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/lowuson_fujeve.pdf
    • https://nogegonimever.weebly.com/uploads/1/3/4/3/134340032/wuxalotim_bixenibinawir.pdf
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/8457526.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mefonevimimix/budget_2019_20_india_in_english.pdf
    • https://uploads.strikinglycdn.com/files/bfc0fe24-8622-4e1e-8e05-1d175366a04f/diagrama_de_ishikawa_libro.pdf
    • https://static1.squarespace.com/static/5fc0d4086b97992eb55bb7f9/t/5fc6c5ee7995075abdcdc155/1606862318947/hoya_carnosa_snowball.pdf
    • https://static1.squarespace.com/static/5fc51391a8793968642310f4/t/5fcd3af59aa2de0c649f834e/1607285494972/cube_dash_cam.pdf
    • https://s3.amazonaws.com/tipikaxe/soma_pescado_bike.pdf
    • https://uploads.strikinglycdn.com/files/65b8c828-b40f-4c4e-9c36-541bbde4494d/lego_harry_potter_5-_7_walkthrough.pdf
    • https://s3.amazonaws.com/dazemi/arlissa_we_won_t_move_song.pdf
    • https://s3.amazonaws.com/lolaritemukole/cd_cover_size_template_psd.pdf
    • https://s3.amazonaws.com/pilazi/youreporter_maltempo_liguria.pdf
    • https://uploads.strikinglycdn.com/files/57b700ba-cc76-453c-a077-e8745bce2f3c/southern_pines_womens_health_center_southern_pines_nc.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/warfarin_bridging_therapy_guidelines.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c998.bin
7c25a3a4d367569ffb3bcc06d345fa4e0a247a3f46c2ca130c12cc9cc58cfc88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC998 5584 bytes
font_01_sfnt_off0000dc7f.bin
44d289154cc2d0a5031ddc3bfd04e0d200ddf470439bce2357baf206f3050d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 9832 bytes

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