Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdd09023be731ec…

MALICIOUS

PDF

76.4 KB Created: 2021-04-12 15:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a1665a770a08010ce7d354b5f0d061ff SHA-1: 23e8d088ce1f8ee4de314114cd9cc974861e3f1c SHA-256: ebdd09023be731ec4df474117f8e1f44eb888e389465df4117108fe3d735687b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'link farm', and is flagged by ClamAV as 'Pdf.Phishing.Trojan'. The primary URL, 'https://dugedepap.ru/strik?utm_term=the+sedona+method+hale+dwoskin+free+download', suggests a lure for free downloads, likely to distribute malware or conduct phishing. No scripts were extracted from this sample, but the extensive linking and heuristic detections strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=the+sedona+method+hale+dwoskin+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386839/normal_5febee48681e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470961/normal_6068be26939ee.pdfIn PDF document text
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/ramavuxufoditab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410194/normal_5fe57b6188a01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491155/normal_603c65a28829e.pdfIn PDF document text
    • https://peroleliviw.weebly.com/uploads/1/3/4/6/134648746/48ba58f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_60390df29569e.pdfIn PDF document text
    • https://fotunerabo.weebly.com/uploads/1/3/4/0/134042859/1dfc92b408d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390664/normal_604a1923b96ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5ff4df5420a75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419001/normal_603838e443233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451742/normal_602f223653187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446774/normal_603446cb935d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeea3409-1c8e-4ff1-8e7b-edbf01d503bf/85331569931.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/dawuxubazukugud.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/bakidugetejasolek.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/lg_cd_rom_driver_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/lovunafagali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ec08c4-e9ca-4a2e-abdc-10b1b35b6194/54231110195.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/pcr_types.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_off0000ebd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD5 5252 bytes
SHA-256: 2c0043c188b3bcdf30c64bf27b1ad758313bc92564843dd6b7018dc60e820ff9
font_01_sfnt_off0000fd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 11360 bytes
SHA-256: 400953dc78d92f92cb3f6e99b9a6353a467dc9749dcc40eb567903add00aa9af

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