Malicious PDF — malware analysis report

Static analysis result for SHA-256 b059cc41618f4dce…

MALICIOUS

PDF

92.2 KB Created: 2021-05-11 18:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d5fc57f0b93ce374932a69111b7ddff SHA-1: dfb44d8ca1aa78fd47ce008d4e53038dae21418e SHA-256: b059cc41618f4dce5a82db53c00e513deaad184ca998a5df7db03dfed4ed3fd7
186 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 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/strik?utm_term=bomba+de+ariete+mercado+libre+colombia PDF link annotation
    • http://sugoxebojun.getenjoyment.net/beginning_weight_training.pdfIn PDF document text
    • https://tojoniwov.weebly.com/uploads/1/3/4/6/134602819/5045830.pdfIn PDF document text
    • https://vatopefo.weebly.com/uploads/1/3/1/3/131398509/52e1148c3f5.pdfIn PDF document text
    • https://vofamebibefa.weebly.com/uploads/1/3/4/6/134694090/dobitapigaguwojija.pdfIn PDF document text
    • https://rizegenaw.weebly.com/uploads/1/3/4/1/134108854/wemib_lopepexuvomima_gakijun.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/xuxazelul.pdfIn PDF document text
    • http://custits.space/keto_smoothie_recipesogcz3.pdfIn PDF document text
    • http://geleostone.online/jasexaiyfk0.pdfIn PDF document text
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/8d8ec476.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/80650316643.pdfIn PDF document text
    • http://aycotoro5.xyz/zogunudikanupinq099n.pdfIn PDF document text
    • https://rafowatixi.weebly.com/uploads/1/3/0/8/130874563/sazolizo_fojokol_xofonitotej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miganuvag.myartsonline.com/masibexejodifebaguwitura.pdfIn PDF document text
    • http://sarutufasiko.atwebpages.com/bodybuilding_anatomy_1st_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/swat_training_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/vexovaximewavokag.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/what_does_kcal_mol_mean_in_calories.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/lineman_s_and_cableman_s_handbook_11th_edition.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_off00012ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC2 5096 bytes
SHA-256: 1ab3bc3101066d7cbd255cc2abebcc4679bc26659316497998aa31e3837bc879
font_01_sfnt_off00013bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF8 12352 bytes
SHA-256: 76695c229bf041d02877dcf6fb004c1e9149a3b4751333293556253da16b791c

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