Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dfc2b52d7eb389…

MALICIOUS

PDF

76.1 KB Created: 2021-05-27 21:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f92c68243df98f397069d41726d2f2ac SHA-1: e1b9b1b95c8330e043c6651705eb488a74c72e6a SHA-256: 08dfc2b52d7eb389976884deadbf3b7326f28c260bce29c405a8006bab033549
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. The ClamAV detection and ML classifier also strongly suggest malicious intent. The embedded URLs likely serve as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=las+4+p+del+marketing
    • https://vifejekim.weebly.com/uploads/1/3/5/3/135322606/vosukakusokazosi.pdf
    • https://cdn-cms.f-static.net/uploads/4379855/normal_60634bd311ff5.pdf
    • https://cdn-cms.f-static.net/uploads/4417423/normal_602f1f644db80.pdf
    • https://cdn-cms.f-static.net/uploads/4417405/normal_605c0349e786f.pdf
    • https://vibofizetukoz.weebly.com/uploads/1/3/0/9/130969748/2177556.pdf
    • https://bekaxerovesujes.weebly.com/uploads/1/3/4/8/134856890/susulurekaxatuk.pdf
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/sewefelubil.pdf
    • https://static.s123-cdn-static.com/uploads/4410965/normal_5ff1f6420a42d.pdf
    • https://fogurasetaj.weebly.com/uploads/1/3/5/9/135961985/varigujovirekupej.pdf
    • https://cdn-cms.f-static.net/uploads/4388841/normal_6049392521b88.pdf
    • https://xonedanafesiliw.weebly.com/uploads/1/3/4/6/134633415/logagut.pdf
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5ff4275a2c6bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6eaf2ed5-8208-4627-adfd-2f38d2cd9c8d/unit_4_congruent_triangles_quiz_4-1_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/3148ad87-4ae7-45ae-bcce-406bb4fee806/sofetonelifavagutowuroso.pdf
    • https://uploads.strikinglycdn.com/files/26e6dc6d-9f25-4a58-901e-740be3f42b1d/47577763054.pdf
    • https://uploads.strikinglycdn.com/files/93d6488b-03b3-4b4a-96c6-74fc4f441bad/bose_cinemate_gs_series_ii_review.pdf
    • https://uploads.strikinglycdn.com/files/fb096031-c891-413f-a2d0-03f118b46c02/facebook_recover_password_with_friends.pdf
    • https://uploads.strikinglycdn.com/files/c2f59b03-4dc8-467c-9dc4-80a73ad72216/stihl_gas_handheld_leaf_blower_bg_86_c-e_z.pdf
    • https://uploads.strikinglycdn.com/files/0e486261-8c67-4224-8b4f-317ff1282aa3/noxususupumazivasibebukaf.pdf
    • https://uploads.strikinglycdn.com/files/cbbfc27f-d6d9-4461-8a35-1fc3d6ebfe8c/watovafomumanenoxoxuzew.pdf
    • 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_off0000ea71.bin
d381aa10526929cb7669fdbc7261640568d65153c145f7c46c4fce4c883fe7cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 5372 bytes
font_01_sfnt_off0000fcaf.bin
ad0c05c22c57218626933ed47993904fb026099be40c7d70092bd61fb2149494		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 11508 bytes

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