Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee594d975c6476c…

MALICIOUS

PDF

73.2 KB Created: 2020-11-22 09:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 82ee06398d2147636d653e1a376271f3 SHA-1: 1fbcb5f279291abc092d439965f7a655573b165c SHA-256: bee594d975c6476c5902f8852b2f18cbd7b97a5a950a5280855d07caac981a43
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets, suggesting a link farm or redirection scheme. The embedded URL 'https://trafficel.ru/123?utm_term=drift+cars+for+sale+arizona' and the heuristic 'PDF_SEO_LINK_FARM' indicate a phishing or malicious redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature.

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://trafficel.ru/123?utm_term=drift+cars+for+sale+arizona PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393904/normal_5f948d18da9f0.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/sodiwenavugajot_dusat_xalezasesipir_jagapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5f99237d88dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f87aa217493d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387230/normal_5f9771407d8ad.pdfIn PDF document text
    • https://joxenawofin.weebly.com/uploads/1/3/4/3/134342561/siwowilabeniwadaz.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/776738.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/4200834.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/peveziwoguxuzam/xomil.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/pelibileribovawafexej.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/57560666419.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/china_taste_portland_me_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/43184387562.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/que_significa_el_arca_del_pacto_segun_la_biblia.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_off0000e303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE303 4924 bytes
SHA-256: cc4f223d623e25a25b325309eb6b03ead649973829f289f02c35486b984a70b8
font_01_sfnt_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 10632 bytes
SHA-256: 5a3c3b96105026595f2d0065e58750405187f7026ace788db6561eb1460c969b

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