Malicious PDF — malware analysis report

Static analysis result for SHA-256 9061cf629a89195d…

MALICIOUS

PDF

107.2 KB Created: 2021-03-14 18:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc2202139185589c8503ea29936394f SHA-1: 2db5acf02a9930429843c9591b3695b5d2258e0c SHA-256: 9061cf629a89195d05f2d34901089ff5b7e0f61087d73f8e20ea753e42319e8c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to link farms and potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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://pelibifir.ru/123?utm_term=bgp+protocol+configuration+pdf
    • https://samoxaposem.weebly.com/uploads/1/3/4/3/134361226/5060919.pdf
    • https://nugenezeni.weebly.com/uploads/1/3/4/6/134632238/7392308.pdf
    • http://my-favshopd.online/tewuwatijenomerafunokivetg8uof.pdf
    • http://dmgameplan.com/rocketman_movie_1997l2v4z.pdf
    • https://cdn.sqhk.co/bufutoje/bjidRjg/you_are_so_hopeless_romantic.pdf
    • https://cdn.sqhk.co/difixoruze/rRjhaQI/disney_costumes_for_adults_plus_size.pdf
    • https://cdn.sqhk.co/nolagutotato/jgCghid/apps_my_anime_list_iphone.pdf
    • https://fekizozawar.weebly.com/uploads/1/3/4/3/134338272/8342665.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7534dedf-52a0-4006-9392-00bfdeb25cb9/ingenuity_automatic_bouncer_how_to_take_apart.pdf
    • https://uploads.strikinglycdn.com/files/f3c85cbd-e61c-4d5c-aad9-6299793028be/97190978576.pdf
    • https://uploads.strikinglycdn.com/files/a2a2d018-f2d9-4b22-bec6-efe6fab9549e/what_test_strips_work_with_relion_ultima.pdf
    • http://ruxomipeb.epizy.com/year_6_long_division_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/9c5a2541-b7ca-4b94-b34c-77f869f26862/63153878175.pdf
    • https://uploads.strikinglycdn.com/files/d90dbe9c-7c46-4299-abe2-7d6bf050e1d2/elle_decor_media_kit_2020.pdf
    • http://retejades.rf.gd/whitehat_website_security_statistics_report_2017.pdf
    • https://uploads.strikinglycdn.com/files/62d6989c-889a-462b-b4c3-5653c1a904c6/52951255067.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_off000167a8.bin
0c79290a56841041ab486d5d660f2c7fcc2486b523d03962b8d92a12f7e0037f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x167A8 5196 bytes
font_01_sfnt_off0001796c.bin
fbf7788c90cd11425400103b1a8616cdfed66ec3eb573edace0149ad76ca03a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1796C 11408 bytes

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