Malicious PDF — malware analysis report

Static analysis result for SHA-256 30693532d9d6e822…

MALICIOUS

PDF

82.0 KB Created: 2021-04-05 13:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 00e6b3ee9c42cb07021d6eedb2a1f8bc SHA-1: 210014b8b7241a2f91f8fb5d567ba1a30da7c981 SHA-256: 30693532d9d6e822f628d0a5866084c5bc959abfa6ebe0cbdffc48d4f8ff78d6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=chi+health+center+omaha+arena PDF link annotation
    • http://gravkamen.ru/raxuzopakuzaa22y8.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/gcb2Gpo/everspace_perks_guide.pdfIn PDF document text
    • http://ufenmac.com/in_data_science_what_is_meant_by_a_unicornhfn50.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/minizolarusojedivubuxam.pdfIn PDF document text
    • http://lbaranaydin.com/dakimasasezubomonuewbjv.pdfIn PDF document text
    • https://xitorudabetibom.weebly.com/uploads/1/3/1/8/131856365/vupabisorapoxu-lazet.pdfIn PDF document text
    • https://xekekulok.weebly.com/uploads/1/3/1/8/131857590/1984049.pdfIn PDF document text
    • http://thefortykuti.com/sub_zero_freezer_not_holding_temperature7uaff.pdfIn PDF document text
    • http://sevoxotedeki.medianewsonline.com/xewuroj.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/SDjePvJ/40404803977.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/fhiqIhb/13647471083.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/15327143225.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jdW3hgb/nugabazajafasutaniroge.pdfIn PDF document text
    • http://milanbeachs.space/how_to_use_pellon_wash-n_gone_stabilizerlf6le.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/lupuvogotog/52593033665.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/dowozeburego.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/how_to_pair_doss_soundbox_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c25ef30-f662-4a5e-a6b7-4bb2538c3353/pepunujim.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/oblique_triangle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/32154579805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f36f8e3-d862-48d2-9f7e-3c2cf024b344/vw_service_center_bristol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ff78b9-8855-4102-9430-9e7f1b0402da/dell_e6410_laptop_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76429a9f-7b4d-4a62-94a8-c8eb6c53cef0/how_to_promote_nationalism_and_patriotism.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_off00010258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10258 4764 bytes
SHA-256: 02f08d4acae52fe780739b2969df4071e1fa0fa46ef6a35d3da6b51de83ef3dd
font_01_sfnt_off00011258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11258 11372 bytes
SHA-256: c7cabb2b0d7dc2d1540dfed68eed8a2f626d9b180cc104e135293d6bb722f456

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