Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4509a4a3ff4a5c…

MALICIOUS

PDF

71.4 KB Created: 2021-02-14 17:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7855b6c665ef255c8e3bc69cdc218603 SHA-1: a06ef4565f44da56c9cd89c4f6dec02d1adf6481 SHA-256: 9a4509a4a3ff4a5c6a245ce1a29370922088c57e6ed34f147bb4348a395251b1
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://seumenha.ru/123?utm_term=red+ombre+weave PDF link annotation
    • https://vunusamonumated.weebly.com/uploads/1/3/4/0/134040658/638598.pdfIn PDF document text
    • http://istlan.fun/phoenix_suns_roster_2019jbbpe.pdfIn PDF document text
    • https://cdn.sqhk.co/xorazasuno/geQijhj/julakafejivasikuwuso.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/igzjjeL/bapafoponavimitilel.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/fijjj37/letowuxudusaramefowokuna.pdfIn PDF document text
    • https://cdn.sqhk.co/tifozeborot/xie2Khb/lafigari.pdfIn PDF document text
    • https://jedujidiki.weebly.com/uploads/1/3/4/3/134352610/800c68.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/1700937.pdfIn PDF document text
    • https://fedifugakebijir.weebly.com/uploads/1/3/2/6/132695471/vogijogi_mewirozib_wegogevadimomul.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/UqXjeja/94348452798.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/gfMWkic/razas_de_perros_chiquitos_para_ninos.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/ChjJgfG/mulegedukuforexumikez.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/rexitori.pdfIn PDF document text
    • http://getfreecreditreport.info/65660945436ryeu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mekavebij.epizy.com/xikaluputit.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_off0000d905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD905 5060 bytes
SHA-256: 479f369b7b349d05bf613455ea58e97cf442e3f8ab3cf197a43a2c49156889e2
font_01_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 11492 bytes
SHA-256: ee3bc55f579063d99523ba7baa64d8624b407504ccc054e18e3f036d4ef2c272