Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b31bf975e5469eb…

MALICIOUS

PDF

68.6 KB Created: 2021-02-22 20:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 744f8459cdc63bebf8f3b7537eb82077 SHA-1: b17add11c2bca4b14c84d94d313a7c90ab3b988b SHA-256: 2b31bf975e5469eb5991a01626eee32cd7c3f83e8681a318444d0dffa8a228dd
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/wix?keyword=environmental+science+worksheets+pdf PDF link annotation
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/7320292.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/lolazaludiweta.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/55d88c.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/koludokilutinadiral.pdfIn PDF document text
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/jodijibejudo_vurogelafizuvuf_rasosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fd6524e86892.pdfIn PDF document text
    • https://balolenitazir.weebly.com/uploads/1/3/1/0/131071159/nujoleranob.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/9e09c9ace.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/7BiiIoF/wiwitoxekekatanemexole.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/hfYghXh/cardboard_boxes_wholesale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/gjidgfN/virus_on_iphone_xr_calendar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450517/normal_6009f1995b532.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/raralixiwosos.pdfIn PDF document text
    • https://kokonasaza.weebly.com/uploads/1/3/1/6/131636703/ziruwukolezivifa.pdfIn PDF document text
    • https://bemofoserobonuw.weebly.com/uploads/1/3/0/7/130739893/609857442.pdfIn PDF document text
    • http://supermagazforsale1.xyz/gugozodetabinilalebanq0pnk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA0 5568 bytes
SHA-256: cee1a111e783a3b9aac4badf7bdfed23baa752c43a5b57b7b7638491316c92e1
font_01_sfnt_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 10468 bytes
SHA-256: ada1ad75aec95aeed59dc4f7fc2e07531d92a8ae7ed2ca6600e1571e8c84a71d

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