Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d42f9fed4eb19bf…

MALICIOUS

PDF

74.1 KB Created: 2021-03-05 03:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 51e51097a2845bf12db7b4337c040137 SHA-1: be32e83d76351bb42620226945f0d81fb04a4810 SHA-256: 5d42f9fed4eb19bfb0849abc164405b1f8a0123b3f1b4871e35cb3d990d14a20
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document's structure and embedded links suggest it's designed to redirect users to malicious content, potentially exploiting the user's need for printer network settings.

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
  • 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://maypoin.ru/strik?utm_term=hl-2270dw+print+network+settings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459788/normal_5fd7cd7864f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_5fda470f36b40.pdfIn PDF document text
    • http://betixisu.22web.org/79230021850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416654/normal_6027771a98502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388824/normal_6005831d9840b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_602be9f52e12e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411231/normal_6007fa801ac65.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/a9785d23-f1eb-48b8-a14b-0f42f058140d/62139481688.pdfIn PDF document text
    • http://zatomad.epizy.com/sigmund_freud_books_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643482a0-6106-49e1-96b5-54d6a0c04ae6/3162176780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b5cc2b-5710-4de6-894d-30646e021e4f/guwadegadebagilanevijez.pdfIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_33c29babc3d64ea29baba958cfad8506.pdf?index=trueIn PDF document text
    • http://wuliwopiveti.rf.gd/1996_honda_accord_catalytic_converter_scrap_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87032ebc-c0a8-483d-81d5-e014a08d6ce9/best_kitchenaid_stand_mixer_color.pdfIn PDF document text
    • http://finubovuputok.epizy.com/what_do_you_do_when_you_feel_empty_inside.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_0f0bcf69b3fb47a5b5b8c0317a6de4a9.pdf?index=trueIn PDF document text
    • http://jabuzom.epizy.com/world_of_darkness_combat.pdfIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_0c25a28a1db440f09ffe6d0a8d38eee1.pdf?index=trueIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_d4394488a36344f8b126443f8262cbb0.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_off0000e09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 5420 bytes
SHA-256: 7f257517b8b72330fa01e4c5d2bbf5428bb6a205c7b6e39efa9290ee73e51375
font_01_sfnt_off0000f341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF341 11736 bytes
SHA-256: 932c7c1ae6227b7f60f408730c6686adc05be63fe916863dfecd736cf621a565

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