Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d29977cea68198…

MALICIOUS

PDF

65.3 KB Created: 2021-01-08 11:27:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 93ad87675331d3251bef5f1514a80dc7 SHA-1: 49c0c30e791b0a0d4283e9266e2e6388f150e8f8 SHA-256: 25d29977cea68198a7d1fdcb48a2176e9954fb03426e72dead61c1d5599f3d3a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and link farms, indicating a phishing or SEO poisoning campaign. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the document's structure suggests it's designed to drive traffic 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://traffine.ru/aws?utm_term=capello+aromatherapy+clock+manual In PDF document text
    • https://cdn.sqhk.co/suwezuzifu/tiaxVic/janikajolojalorejuwelin.pdfIn PDF document text
    • https://nezasitize.weebly.com/uploads/1/3/5/3/135303973/99982.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464700/normal_5fce58fe9eabe.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/VY1ifhj/baking_recipes_from_scratch_easy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcfe4ca7c158.pdfIn PDF document text
    • https://cdn.sqhk.co/salusasopuvi/7ieGEaB/brimming_synonyms_dictionary.pdfIn PDF document text
    • https://jutovadisew.weebly.com/uploads/1/3/4/7/134720627/dewulafilat.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/gailfgj/super_street_fighter_4_arcade_edition_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/3BiaQhh/24896416353.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/0322f472-ad22-4e3c-8f79-fcf4310f6725/13201123123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f32e9f-4108-45fb-81d3-30c4fba0f71e/rodobopatajide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532c4ebc-734c-4878-b921-2654e1ac0ac9/wejufovurizota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/743cbf21-2002-4b91-a99b-4de4bd2130b7/eugene_v_debs_apush_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9aee53-821f-4ae5-9814-d2f28d563ac9/leluruzed.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_off0000c383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC383 5068 bytes
SHA-256: 785787c304013f13783921827560248a4b69468015097363fa20ba7d44180571
font_01_sfnt_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 10156 bytes
SHA-256: 621210bfa2af503eaecfbf88f5eb8d985c181cbb91944d8af7f7e42a39b0a648

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