Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aeaaeb6bb023774…

MALICIOUS

PDF

67.7 KB Created: 2020-11-18 02:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 921958100a0767fe92a27e15c4255c3f SHA-1: d2b22f2bfc96341921bcc2ab048ba5b2128efe04 SHA-256: 3aeaaeb6bb023774aa979bc29eda280e5a1e90adea3705948c847d101376d066
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/123?utm_term=cn+label+for+tyson+chicken+nuggets PDF link annotation
    • https://gunapozebufe.weebly.com/uploads/1/3/4/3/134316646/selilisejikanez_ruxuxiwogu_jofepov_gekowegul.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/7c1401216eb.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/jeparijurilet.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/tuxenipup/vevutufusiwikojowixa.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/rugoguwesa.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/pathfinder_character_class_list.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/bully_lite_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/fegogixomuxinajul.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/bl_theraja_electrical_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/growthink_marketing_plan_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/idaho_auction_barn_auctions_4.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_off0000cdf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF2 5356 bytes
SHA-256: 5ac1693079e490dd77cc4fe0da077d6089d1f15b4ba8a2d6f5e4d923f880fc9f
font_01_sfnt_off0000e02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02C 10104 bytes
SHA-256: edeb1c151a34d4cf2f3df684721015051093eddac86b82eeac0ab7ab8d6ee82b

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