Malicious PDF — malware analysis report

Static analysis result for SHA-256 8480707a7e2d6721…

MALICIOUS

PDF

64.0 KB Created: 2021-01-06 05:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 701a9a9c94b3c35e59afccedb72b0fe2 SHA-1: ef43408cbbc63908bfaa1e07d7ef83080d3328f5 SHA-256: 8480707a7e2d6721b1d9fcd668cc9315ccca1ecb171677ea8d70d33ae2b687fa
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'Addams Family Musical conductor score pdf'. The presence of numerous external PDF links, many pointing to potentially benign but externally hosted files, suggests a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the primary attack pattern involves redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=addams+family+musical+conductor+score+pdf In PDF document text
    • https://nipezititixi.weebly.com/uploads/1/3/4/6/134688951/forilipezasulig.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/ab27b64599.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/4WfJeif/trade_island_ancient_sands.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/Yiiige9/zombie_smasher_2ds.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/93a3dbd1-6bfb-495e-a965-9af5dc3567e8/vinavabeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7967b2bf-857f-49ee-b1c4-94927e468327/koxolaxikolosubebenuwako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90ddcee-321d-485d-8370-8e42d9f930df/63428350493.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff25777a-8fe0-4a6a-ba94-2fdce3e1b7f9/58492230970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e4fd97-207f-4359-8309-1fd2ea70ebfb/lelopos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b1146e-66c6-4548-bdf5-147d39046ad1/cartoon_wallpaper_hd_for_mobile_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c76d17-2cd0-47e4-9aa0-7f6613a404ac/99680416842.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_off0000bc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC66 5392 bytes
SHA-256: 67c867832f710c14249df4be4528544913aa491ebcde53273f3c20601477f483
font_01_sfnt_off0000ceb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB6 10748 bytes
SHA-256: d2b17228bc4fe9c22019b21e40eae1a0363ed9d84471a67d791fa0e49c66a17f

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