Malicious PDF — malware analysis report

Static analysis result for SHA-256 48859d85ae9ba74f…

MALICIOUS

PDF

86.4 KB Created: 2021-05-25 12:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 98e1d17337de7352cf7206edb058d194 SHA-1: b13eb00b64a1cc8b77f600c54fbed7653b400711 SHA-256: 48859d85ae9ba74fd0ac2b74a7c89f12d7c6c0935871f5967a3c4a8058def63d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=how+much+oil+goes+in+a+troy+bilt+pony PDF link annotation
    • https://famopedudir.weebly.com/uploads/1/3/5/9/135978287/bef9648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_601f232309f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408598/normal_604ee838a2d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fdc76b290008.pdfIn PDF document text
    • https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/09ec33d7098cda.pdfIn PDF document text
    • https://mozosuroje.weebly.com/uploads/1/3/4/4/134456199/fogigopamo_sinotoja_fijadeliwuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382793/normal_601fd2e3aae6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367648/normal_5fe547e18ff1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_604fa3ecd9689.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416131/normal_5ff221a14a633.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502248/normal_5fcd5dc67d4e6.pdfIn PDF document text
    • https://jasefeneg.weebly.com/uploads/1/3/4/4/134489721/kaxavidumaka_pogijeverox.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/bulozor/dufawiwevoziwuxazedasigaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21a9a36-4f83-4c98-83b5-4512164a03f8/79547079647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67182926-8e89-462c-8b20-fdd59ffd9dfa/swann_camera_power_supply_splitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f2f2db-aa12-46a9-a20b-5301f5cf1fb5/mibowexisupizoreja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378ff31f-8f90-442a-b5f1-9321b8b62c09/nijufotodenopefedis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f582916-6d38-4f01-8890-2d34af335def/lewis_structure_practice_worksheet_1_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9e70e6-110c-4efa-be3e-11a0b7b75d56/88505132228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b285df29-5aaa-4690-8049-a5471fcf708a/how_does_a_leader_deal_with_conflict.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/rajapujajolu.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_off000111fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FB 5644 bytes
SHA-256: a8e3553afccf6e93fdca4f3d12a5d795cb8827dd07487fb855af4e9fb17bc561
font_01_sfnt_off00012519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12519 11444 bytes
SHA-256: db8b438026f78b45294f8bf904d0c4db6c0ce931e6a87f65811a84397d1125f4