Malicious PDF — malware analysis report

Static analysis result for SHA-256 45375e220cd1fd31…

MALICIOUS

PDF

87.6 KB Created: 2020-12-24 04:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ee01c08e6a947356a864195f5c409f68 SHA-1: eaecbabfafdf198f78ff098c3489dc1fdf39217d SHA-256: 45375e220cd1fd31e5102efbe1e187a478bec1facc574d9924e8f49be3177908
164 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, identified as a link farm, with one prominent URL pointing to 'traffking.ru'. The presence of a 'download button' heuristic and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=pottery+master+relaxing+ceramic+art+mod+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493553/normal_5fc4cea4881d8.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/3112502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5fd237bd3ac28.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/jihhahf/39390256665.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/ihegfii/67867653262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_5f974a63a1d10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_5fa83db8bf46f.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/narudogosivefujopu.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/radubozufiwo/95674041249.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/introduction_letter_format_for_manufacturing_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40c99d8-14ec-4a43-be35-76715d8e3d45/tv_guide_listings_st_joseph_mo.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/32436865817.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/99978261319.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/automotive_maintenance_and_light_repair_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a799089-3ae9-4867-bbe6-be9e2b5f76c8/leburamomimasexigotaza.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00011d30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11D30 27068 bytes
SHA-256: a242039630a8c977ef65f34c26d9b508fb9fea1c66283e7e4ef95321b3285c22
font_00_sfnt_off0000d97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97C 2880 bytes
SHA-256: ac64b8af80fcca1e0e594fba8a0f1e66fdecb42d42f059741c9e9f76428d751e
font_01_sfnt_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 5628 bytes
SHA-256: c3bef86b145693a2dc76f936fff718d48924f622b862d94f6372988da9979167
font_02_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 11504 bytes
SHA-256: baca816a0df6275d9d0b795cd227e2d3f54ce435d9c5ab745a5a5781d39e4aba

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