Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f420d9fbd12b5a…

MALICIOUS

PDF

68.2 KB Created: 2021-02-21 15:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cb735832a620ddd85b5c0356cb424f69 SHA-1: 5e4b8a503e96f2a8569e0df6ffa4ea08d2b1a854 SHA-256: 50f420d9fbd12b5a7e6b9f5542ba59b5b8cd4da31917a97f6292dc648094a83e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains numerous external links, many of which are hosted on disposable domains or file-sharing services, indicative of a link farm or phishing lure. The 'PDF_SEO_LINK_FARM' heuristic and the presence of many unknown reputation URLs strongly suggest a malicious intent to redirect users to potentially harmful sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=what+size+tires+for+2016+toyota+corolla PDF link annotation
    • https://tugesarafexo.weebly.com/uploads/1/3/5/3/135319839/vumafoganoxe.pdfIn PDF document text
    • http://ita-talia.fun/880252742323agab.pdfIn PDF document text
    • https://gigunomivu.weebly.com/uploads/1/3/0/9/130970016/8c090a81307.pdfIn PDF document text
    • http://winoraama.fun/turbo_wheels_flip_over_carrmw9u.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/lavusoxewozitizo.pdfIn PDF document text
    • http://thepropheticapp.com/58638554840zro4v.pdfIn PDF document text
    • http://brumbum6.xyz/wuzujuzazogezupomoh1qlx.pdfIn PDF document text
    • http://eeeeeyyy.space/zend_php_certification_study_guide_pqx4yq.pdfIn PDF document text
    • http://italdom.fun/tupelakisomamonawymn3r.pdfIn PDF document text
    • http://smartcreditus.info/72581645173pv3gt.pdfIn PDF document text
    • http://dvigatel.guru/character_design_for_animation_model_sheet8gar8.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/b0ebeadb04992.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/mipeboro/wogefipuderolilakileji.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/pentax_k3_vs_canon_5d_mark_ii.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/loyalty_card_template_publisher.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/string._format_c_datetime.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_off0000cda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA9 5612 bytes
SHA-256: fd9f0eb0da221b35a63ed718f5d2a39c4b706a5dbb911096972ec0a74fb926ec
font_01_sfnt_off0000e0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DC 10136 bytes
SHA-256: e9407dcb1fd709629483a923ef43f7f1ad0ffe7f754d46950283593d0610e0f8

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