Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed49450675d8e5cd…

MALICIOUS

PDF

87.3 KB Created: 2021-01-11 10:27:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5c365c40ae877b3769d94cd698cd5cb2 SHA-1: 7de7da1e8163279b94c3e88aa4e61f2a8f5ca7b3 SHA-256: ed49450675d8e5cd55b5f49a13bd4fb77ad727605acf5a152478639d53fac359
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm and a potential phishing lure. It contains numerous external links, with one prominent URL being https://trafffi.ru/123?utm_term=community+college+teaching+credential+online. The document's structure and the presence of many external links suggest an attempt to manipulate search engine results or redirect users to malicious content, aligning with spearphishing tactics.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffi.ru/123?utm_term=community+college+teaching+credential+online PDF link annotation
    • https://site-1174077.mozfiles.com/files/1174077/lebuxile.pdfIn PDF document text
    • https://site-1167955.mozfiles.com/files/1167955/38824583500.pdfIn PDF document text
    • https://site-1173429.mozfiles.com/files/1173429/fopazenoxuzosixexa.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/7c8d21b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_5f94978ee105a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5fe3b32b4e741.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5ff4b945149ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f8e57c4edf3a.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/sopedope_pabilapivijib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_5f9d16ddf30bb.pdfIn PDF document text
    • https://site-1176591.mozfiles.com/files/1176591/90111683318.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/cbf440b01ea28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469128/normal_5fb8e4d491407.pdfIn PDF document text
    • https://site-1176681.mozfiles.com/files/1176681/kinukanidipopa.pdfIn PDF document text
    • https://site-1176460.mozfiles.com/files/1176460/64815313729.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFF 5184 bytes
SHA-256: 36d3b61d78afd4360efc29eb01877d4e624857155dee54ad05babda776d7c7e2
font_01_sfnt_off00011f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F77 10164 bytes
SHA-256: a5189a7adcc70c2a05632065923851991ac701698dd8af26dc913abdb205ea0a
font_02_sfnt_off00014207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14207 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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