Malicious PDF — malware analysis report

Static analysis result for SHA-256 957048867357814b…

MALICIOUS

PDF

95.5 KB Created: 2020-11-26 04:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 90d8a0fed127015462c2f2c646ff1766 SHA-1: 91459e441165d7ab366ba571c7bfc731f1d7c0b3 SHA-256: 957048867357814b68eb50118e19edeb9ba869ebc8717a8eb68ba3d858fd8889
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 SEO manipulation tactic. One prominent URL, 'https://traffking.ru/strik?utm_term=4l80e+for+sale+kelowna', appears to be a malicious lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

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://traffking.ru/strik?utm_term=4l80e+for+sale+kelowna PDF link annotation
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/sevubinizibalux_bidon.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/0efa7.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/tinajabizoreguf/annual_leave_request_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/baba_yetu_noten.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/fiporiturizuzetisake.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/50798851872.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/wawaloju.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/existing_home_sales_report_today.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/ferry_service_to_dog_island_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e0d1a4-bfb6-44ab-968d-7e51f206b4b3/14537491961.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/everett_parks_and_recreation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/bukeburigategesijoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12982 3224 bytes
SHA-256: eb14bb90e0c3565fd60a16a4eeeee009973b2ae86f09efba35b13b617a4d9255
font_01_sfnt_off0001350f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350F 5244 bytes
SHA-256: d84841b97f0dbf020b0318730dd2d2db3b967e7a1a72690cef0f42deb50dad23
font_02_sfnt_off0001470d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1470D 12184 bytes
SHA-256: 64dc78906f312650a27ba1d4af5ca8a8fcda0c7299ccbd1d0f800b7aa5a13305

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