Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff98a7fc43bd8c5…

MALICIOUS

PDF

80.2 KB Created: 2021-05-10 00:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5a5a53dda651fe918c221dd7003161a2 SHA-1: da7b5e15b107ed6bfbf07112ed5ad3e04115fc05 SHA-256: 5ff98a7fc43bd8c5692b4c372151378728c16eaf4793198da96114ae1be3224b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link that redirects to a malicious domain, likely for phishing or malware distribution, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body, though heavily obfuscated, appears to reference the lure 'Sims 3 university life crack 1.67', reinforcing the phishing pretext. The presence of numerous external links suggests a link farm or SEO manipulation tactic.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=sims+3+university+life+crack+1.67 In PDF document text
    • http://linufiwanekume.scienceontheweb.net/vogitulenadigawogulumulip.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/60724864457.pdfIn PDF document text
    • https://sufogewanogona.weebly.com/uploads/1/3/1/0/131070160/9576271.pdfIn PDF document text
    • https://kukitame.weebly.com/uploads/1/3/1/3/131379641/356897.pdfIn PDF document text
    • https://cdn.sqhk.co/gunuzuli/EifdCM6/the_emerald_maiden_symphony_of_dreams.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/ian9Nif/space_news_live_tv_channel.pdfIn PDF document text
    • https://sokifaxus.weebly.com/uploads/1/3/4/6/134666683/kukigitogokemezo.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/c1599bfd-7d77-4166-976d-538c02570893/bolens_riding_lawn_mower_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/59788388249.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/indesign_print_booklet_high_res.pdfIn PDF document text
    • http://vidilig.onlinewebshop.net/engineering_company_profile_template.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_d704b19eb7a940e9bba31bf2ad09b3e8.pdf?index=trueIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_4fc08a3de88045b5b0e1055a3b0ea5da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/12249276137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba97e6e-2bd3-4007-87c3-e1848efafc14/9874361646.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/52710066793.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_off0000e9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9ED 5836 bytes
SHA-256: 85339cc1fe59ca967e7811fe9cadf5946cbf9c7455241b947be5ccc085f1e5cc
font_01_sfnt_off0000fdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD2 22868 bytes
SHA-256: b7ee71d7ba9a6bc143b33ab1ee5c8f20b6dcd9916cb02da5f7c5f407439e4aa9

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