Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d5f7cd6d612db4…

MALICIOUS

PDF

71.7 KB Created: 2021-03-04 01:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 982611be154bfd40a35247a411da46f8 SHA-1: e48457b12dee6b3b2f93f9311663f3295684ba3a SHA-256: f4d5f7cd6d612db4f8662e2d273b8ac0a34e3ba7c882185ccaada67bc43b64cf
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=how+to+construct+a+dilation+with+a+scale+factor+of+3 PDF link annotation
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/zoronekolive.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_5ff0edb6963fd.pdfIn PDF document text
    • http://rubeatyshop.xyz/what_does_in_the_rabbit_hole_meanbjort.pdfIn PDF document text
    • https://momimuraw.weebly.com/uploads/1/3/1/3/131384495/5997217.pdfIn PDF document text
    • http://gallery-shop.site/3896871013jwnfy.pdfIn PDF document text
    • https://kelezisexuva.weebly.com/uploads/1/3/0/7/130739204/danosotikil_liwasux_bawobov_kisegipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474723/normal_5fd3bc17c02fd.pdfIn PDF document text
    • https://lasasokuvob.weebly.com/uploads/1/3/1/6/131607269/bewubuzutotuzebapid.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/samsung_smart_call_app_keeps_stoppingwlogs.pdfIn PDF document text
    • https://neletataw.weebly.com/uploads/1/3/1/3/131398134/98e9b.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/fupotesodatugo.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/8729675.pdfIn PDF document text
    • http://pihodze.com/67809494920g1m2m.pdfIn PDF document text
    • https://wapavamo.weebly.com/uploads/1/3/1/6/131637186/33412f36bc92f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_602fffe0cdc47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunoxoxuri.epizy.com/big_sean_songs_2019.pdfIn PDF document text
    • http://dotemifa.epizy.com/lonibevemazelinudetib.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/neonatal_seizures_guidelines.pdfIn PDF document text
    • http://bonizeza.epizy.com/bezepadiwasisewasuxoni.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_off0000da63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 5328 bytes
SHA-256: c443e85b32a79c8da6b60f3b6dfd9035dc51be0df18c0c08b63b28525b3180be
font_01_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 10752 bytes
SHA-256: af1a64b972a3c45fedc8aab7db8325784b78304e0961f1563260f6950bedf54f

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