Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c8b864414bd2c8…

MALICIOUS

PDF

70.9 KB Created: 2021-02-14 08:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2a7eb43e0e28cf57d32f6f2414a1d82c SHA-1: e06772ba6bf1d695f89a91e5af3cd63df8061416 SHA-256: 50c8b864414bd2c8cf0c4a738f6cd0ec75d32b8e727c17b22fa26dc86d275026
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/123?utm_term=lenoir+rhyne+canvas PDF link annotation
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/lebodebaxibif.pdfIn PDF document text
    • https://fabomitax.weebly.com/uploads/1/3/4/8/134888897/gubojawarenejetone.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/raduf-fezemeromosev-pajigizifajat-balinebi.pdfIn PDF document text
    • https://jadilibetaz.weebly.com/uploads/1/3/4/8/134871175/tuzab_losapawewixo_labax_bomonatipuxukog.pdfIn PDF document text
    • https://bagopilijesab.weebly.com/uploads/1/3/1/4/131438775/187008.pdfIn PDF document text
    • https://vepovadubit.weebly.com/uploads/1/3/2/6/132696500/tunijizat.pdfIn PDF document text
    • https://gununoneku.weebly.com/uploads/1/3/4/3/134309052/1585518.pdfIn PDF document text
    • https://wulukisogexoz.weebly.com/uploads/1/3/1/4/131438059/298509.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/2d13a064.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/fezuw.pdfIn PDF document text
    • https://fixemebipufuw.weebly.com/uploads/1/3/4/1/134131586/xuvinesur.pdfIn PDF document text
    • https://pupowoxixibigi.weebly.com/uploads/1/3/1/4/131438439/nidogusaravirutigi.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/5859212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://notaruk.rf.gd/89567168772.pdfIn PDF document text
    • http://tonezifimoraga.epizy.com/fha_underwriting_guidelines_for_new_construction.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_off0000d766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD766 4956 bytes
SHA-256: 4514632bedc46b10823c464ba5876d105cbfb6df810110c37f3b50fd4ae0054b
font_01_sfnt_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 11508 bytes
SHA-256: 7d92f87701d7109771694723d9a34151f8c29bc1f19ae4f801cd7d53ae87e84c

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