Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc09b060f96ceb41…

MALICIOUS

PDF

93.8 KB Created: 2021-01-20 15:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 35487243e73d9681cff9b4be9ed05f04 SHA-1: ecf20dfda2da0925aa1a14d3275475f678465af4 SHA-256: cc09b060f96ceb41b37c4e63f4de21347ebbdb00fd37c4fa06da6093ae5d500d
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/123?utm_term=adobe+master+collection+cs7 In PDF document text
    • https://cdn.sqhk.co/lelogivotosu/h6jdbNZ/rolling_stones_t_shirt_vintage.pdfIn PDF document text
    • http://fepotarugagi.22web.org/viwazilifamokedejubu.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/zusupema.pdfIn PDF document text
    • https://rilumegunelado.weebly.com/uploads/1/3/4/6/134615428/1436098.pdfIn PDF document text
    • http://tobalalupuvobiv.iblogger.org/business_reporting_analyst_interview_questions.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/lewexaxabos.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/mawekom.pdfIn PDF document text
    • https://xuwosanilenerev.weebly.com/uploads/1/3/4/9/134900173/bapovizefex-duxepawugisiviw-boguwox.pdfIn PDF document text
    • https://gevupowola.weebly.com/uploads/1/3/1/4/131483584/a3dc77251f292d1.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/tusamu.pdfIn PDF document text
    • https://forexegazujolo.weebly.com/uploads/1/3/4/1/134108883/6968465.pdfIn PDF document text
    • http://rosovutuwonemis.iblogger.org/voice_synthesizer_vst_plugin.pdfIn PDF document text
    • https://site-1172756.mozfiles.com/files/1172756/81317425233.pdfIn PDF document text
    • https://site-1174800.mozfiles.com/files/1174800/flower_background_png_free.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/jezobasit/lavujarutajivema.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/veladixesutulafovajomume.pdfIn PDF document text
    • http://urls.api.twitter.com/1/urls/count.json?url=http://deardanielim.infIn 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_off00013035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13035 5292 bytes
SHA-256: 760de1766a5ab83e3b69ec73a0127689de1691f716f6fec915ffbc27fadfeadc
font_01_sfnt_off00014219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14219 11864 bytes
SHA-256: 442494b7bb73b4c8dd5b9c4e252ae8954a3af1751bd76c76ebcea8f0ea951b65

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