Malicious PDF — malware analysis report

Static analysis result for SHA-256 68521c374d6858ce…

MALICIOUS

PDF

90.4 KB Created: 2021-04-01 10:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5a6132ffa0cb81c5994c95c94a43e1c2 SHA-1: 12f76e03e2af6a3cd01f0d929f380f5ba7be5bc4 SHA-256: 68521c374d6858ce45c97101fc95f98e613416967c5d5da6ef88496981f70779
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://gimoguvi.ru/strik?utm_term=what+were+jason+and+the+argonauts+searching+for PDF link annotation
    • http://woziwowariv.sportsontheweb.net/15296693850.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/bebatewi.pdfIn PDF document text
    • https://toxinezewam.weebly.com/uploads/1/3/1/4/131452950/faxefidukeli_lodekasuvuga.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/25205024835ygizd.pdfIn PDF document text
    • http://mazers.fun/advanced_microsoft_excel_20132giby.pdfIn PDF document text
    • http://itdiscount.pro/blade_180_cfx_servo_gearsj94qw.pdfIn PDF document text
    • http://profibrend.ru/tiwiruxegofujubunugibeuv7xj.pdfIn PDF document text
    • https://dipedupaketi.weebly.com/uploads/1/3/4/3/134333799/156bc0b1.pdfIn PDF document text
    • https://latifaxegorur.weebly.com/uploads/1/3/5/4/135400737/5b9aae6ff3.pdfIn PDF document text
    • https://pesasujax.weebly.com/uploads/1/3/4/8/134882000/xinagezifumaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_bb2fed01546f4a89a5eb1df7825f43d5.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_6c13d72e5e114c319c77f6c66e2c6b92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/multiple_intelligences_inventory_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/daponokomovaxajupuratid.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/75279957637.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/rawagukifovexajiduv.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_6e4637fbbef0440d951dc05af9e5ed99.pdf?index=trueIn PDF document text
    • http://farovosodiwes.atwebpages.com/cell_biology_for_neet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 5432 bytes
SHA-256: d437cce2177f0256bf6cf02cd8abfe711b6cc36a8ecbb5f670669b8e98602811
font_01_sfnt_off000134aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AA 11188 bytes
SHA-256: b519e71cc2166dad8a4b49f0339f10bc8325fad9b45339c92e2f1c3dfc058c5b

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