Malicious PDF — malware analysis report

Static analysis result for SHA-256 34833db3102108a0…

MALICIOUS

PDF

69.2 KB Created: 2020-12-17 20:17:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8b673af707eb90fd0a855cc003607fd4 SHA-1: be73c65550e232a994e5b1b257e10f6574bac90d SHA-256: 34833db3102108a05ebc4fe240349d088b9dd682f155b664645b40f4e0878ab9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting it is part of an SEO spam or link farm operation. The primary URL identified is 'https://trafftec.ru/strik?utm_term=evolution+test+questions+and+answers', which is likely the intended destination for victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=evolution+test+questions+and+answers PDF link annotation
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/vufimar_gomufigiparut_vefejo.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/fijidepo.pdfIn PDF document text
    • https://dodilepu.weebly.com/uploads/1/3/4/4/134444379/1235408.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c965da5-f196-4d04-bc63-03c1253c6af1/pumak.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f4402e537a05ef168230/t/5fd11967fb49ea12ba1193f2/1607539047700/what_does_exorbitant_antonyms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32e4faf-2919-4f53-b6db-e659fbd1879f/90532000110.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/school_class_attendance_register_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2f1ae9-2128-48fe-a66c-baf3c433271f/meme_maker_font.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08ac096-aded-40d7-a55f-48f84cb94365/goblin_slayer_light_novel_volume_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fcb25d533fb14715cb716e8/1607149013466/dragon_ball_legends_twitter_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5bca10-c537-45de-9c81-c1f6168249ae/the_name_of_the_wind_download.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_off0000d25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25B 5056 bytes
SHA-256: f0bfc9db68c3c59ada22b15c565d7a19b6fd07a4a9d1b99c4389e45be96b0c04
font_01_sfnt_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 10696 bytes
SHA-256: f4ddce6622d6b1864b3e7c29ae1fcde85f6251875cb00641c7647ba5171480e3

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