Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f2ad7d933fec52…

MALICIOUS

PDF

83.7 KB Created: 2021-05-16 02:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d34a9e8741fdca9497ca1f663eb7f754 SHA-1: 48f6d1ae44d44cdfb1907ff5c0ac7fecf91ec0c4 SHA-256: 96f2ad7d933fec52fa153426490c216eafc1b3e46708adb5fbb6ee832004afc9
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with one primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=free+minimalist+wordpress+themes+for+artists PDF link annotation
    • http://auth02mobility.com/bose_wave_radio_price_usap21bx.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/sodanomubew.pdfIn PDF document text
    • http://toportt.online/37029643326yaxf2.pdfIn PDF document text
    • http://texivej.sportsontheweb.net/41177367061.pdfIn PDF document text
    • http://indital.space/14238139073q8ze5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366337/normal_5fd08534618c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_604719ac494ba.pdfIn PDF document text
    • http://risitolamaxil.22web.org/expertise_in_nursing_practice.pdfIn PDF document text
    • http://reduslim-italia.website/nobatupeributuwaropm7bbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463808/normal_603da0af3dc1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_603feab544aa1.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/jijudupobapelujyt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_6063d50c3397f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_ffa0c74f0ba14cc39e84c9f78bfbceb9.pdf?index=trueIn PDF document text
    • http://zotodigigaki.epizy.com/93173951438.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_4c7a178300654c5da99ca6a8afd524fc.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_f770adb2140d48e0b51e83079de5dbaf.pdf?index=trueIn PDF document text
    • https://6da1ed31-7a22-45b0-8bc5-463d376071ee.filesusr.com/ugd/29fbaf_12fb0a4807cd4aafb18af16e38789c43.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_68c454d226a040d3bddc246885cdc902.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_8af8f23faa184327827514caa83746c1.pdf?index=trueIn PDF document text
    • http://tiriburud.rf.gd/content_marketing_hubspot_certification_answers.pdfIn PDF document text
    • http://felugibesixe.onlinewebshop.net/7532965425.pdfIn PDF document text
    • http://sewemira.atwebpages.com/construction_of_dc_generator_download.pdfIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_fd58a107b27a4963a8090bcc3afe90be.pdf?index=trueIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_33a1deaa247b4570933fbadb16cda29e.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_ce5f2da9ff33465ca22f88e8e2f653f0.pdf?index=trueIn 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_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 5328 bytes
SHA-256: 41ef1a487c8c4a3a9ad3d43411fa3501cb441f1ed9d73fcca9fcf05f6e96193f
font_01_sfnt_off00011969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11969 12216 bytes
SHA-256: a45c00b52f544b1314f4c34c35fe68cd0bcedfb3046238db501fc88039aeeda1