Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaefdbff09cae88f…

MALICIOUS

PDF

77.4 KB Created: 2021-03-24 18:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: db85ea540948ed5e6d988aacc220c316 SHA-1: 79da921ca5d5b66fd053bde6e85616350cd9f8a2 SHA-256: eaefdbff09cae88f3fe8d954769f91a467922f568a6e1c258ee03fba9b87853d
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 and an ML classifier, indicating malicious intent. It contains a large number of external links, many pointing to S3 buckets and other domains, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://xezojetit.ru/award?keyword=journal+ennahar+dz+pdf, which is likely used to deliver a phishing or malware payload.

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://xezojetit.ru/award?keyword=journal+ennahar+dz+pdf PDF link annotation
    • http://rerazato.22web.org/karnataka_assembly_elections_2020_results_district_wise.pdfIn PDF document text
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/8722543.pdfIn PDF document text
    • https://dofufegudi.weebly.com/uploads/1/3/1/3/131381881/durabuna.pdfIn PDF document text
    • https://pigogiril.weebly.com/uploads/1/3/4/3/134397820/fixamegisada_dagavi_worerorexufasaj_gelitetamefezi.pdfIn PDF document text
    • https://xebanodax.weebly.com/uploads/1/3/5/3/135382800/7cba5.pdfIn PDF document text
    • https://tifozemeg.weebly.com/uploads/1/3/5/3/135325228/01d17aaccbf4110.pdfIn PDF document text
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/af8a82afc.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/pgeVgex/skylanders_giants_xbox_360_portal.pdfIn PDF document text
    • http://nepufazikeki.iblogger.org/engineering_drawing_tools_list.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/papalosiwitol.pdfIn PDF document text
    • https://cdn.sqhk.co/rujojumex/jb4wSie/torn_acl_treatment.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/firudegix/katelabezi.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/100_survival_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/black_jack_manga.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/33314699250.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/avid_pro_tools_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/37607411914.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/endless_frontier_2_beginner_guide.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010189.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10189 21504 bytes
SHA-256: 1c81e7e7e930b84f3e0dab97352a9c73ab78aa65ddcd70045a9a3fc0c574fb18
font_00_sfnt_off0000cc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC38 4992 bytes
SHA-256: 8564298a8d68faeba1193f61790472943796b2780080d1737fe4e98165129b3f
font_01_sfnt_off0000dd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD36 11084 bytes
SHA-256: c9c34b68e77ebd07196accac5010cb40cd6c38799404dfe0738025e0417450d0

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