Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c723a3addabfc4…

MALICIOUS

PDF

71.0 KB Created: 2021-02-25 19:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 07c09008a5cd9bcd53576035a4c4523c SHA-1: 0b72d13a8f1cfc7c2fa16304aa4088655b031141 SHA-256: 90c723a3addabfc48ee2c1e47a151eecb007456a222b4da4014b398e7ada31eb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/award?keyword=history+islam+in+west+africa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460241/normal_603658865b444.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/872988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_6028f105ad29c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475397/normal_602dc62621c9f.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/hcBrje9/nuts_and_bolts_store_calgary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5fd6523c922ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367627/normal_6002623918ec5.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/4418326.pdfIn PDF document text
    • https://tuwopabawebude.weebly.com/uploads/1/3/1/3/131382790/577d4511b6b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457573/normal_5ff516abb18f1.pdfIn PDF document text
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/1668432.pdfIn PDF document text
    • https://cdn.sqhk.co/jetuzama/biajeif/bucket_list_journal_uk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xalasawu/gugixojidapowexin.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/hilti_firestop_systems_guide.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_off0000db1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 5180 bytes
SHA-256: c196c81068325a5b35132eecaf2169aeff5b79f16dd765c1f2a41b01e112b21d
font_01_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 10080 bytes
SHA-256: 1cb43776322cac89ec5d8d35e5158341f3706f5d8e0e74157786ba3c42f0793b

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