Malicious PDF — malware analysis report

Static analysis result for SHA-256 207026c1231bf9ba…

MALICIOUS

PDF

94.7 KB Created: 2021-03-11 20:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e988e971674ffbd680f320f62d38cb4 SHA-1: 9226b1c7d5443098b57a1d9b9ead27ca2c5e1e70 SHA-256: 207026c1231bf9ba80b3ae008b91f378040d82c29f3040396dd24c81d95ba021
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 disguised as journal articles, indicating a link farm or SEO spam tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via the linked URLs. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=transformational+leadership+style+journal+pdf
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/149964db366a.pdf
    • https://static.s123-cdn-static.com/uploads/4458145/normal_5ff974a64124e.pdf
    • http://tibetterrier.ru/700456586565djqx.pdf
    • https://sotoxitubomiv.weebly.com/uploads/1/3/2/6/132695919/rizozezofilum.pdf
    • https://static.s123-cdn-static.com/uploads/4380379/normal_60074626f361d.pdf
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/2842899.pdf
    • https://cdn-cms.f-static.net/uploads/4380214/normal_6048cdaf71d05.pdf
    • http://interbankdigital.com/18288930254r9kyr.pdf
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fd6783998b1c.pdf
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/bijokufajojezemidi.pdf
    • https://zumugewij.weebly.com/uploads/1/3/1/4/131483128/kakupenupujizetiw.pdf
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/jedemetu.pdf
    • https://static.s123-cdn-static.com/uploads/4420903/normal_5feaf9591adce.pdf
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/tiwemuw-lemidobodawabe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_145e395dc35340309ef614b4996921f3.pdf?index=true
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_dd99c3e0997b43fb8ee647d6a81ed757.pdf?index=true
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_e0c093fc87f641fab07873fb200ac12e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001311f.bin
f7ce755eff198d763ee0c758bd92d633d9916dd86d399b4dbcbbeaffbf0611e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1311F 5408 bytes
font_01_sfnt_off00014364.bin
78b9b91a1cfc6de08ec28be27b56e96813d8600ea5b00a720ddad2c07f56a7c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14364 13244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.