Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eafd309cec972ab…

MALICIOUS

PDF

67.2 KB Created: 2020-12-22 22:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b9a873eafe1e126b4d82020f7238102e SHA-1: 94c5f089fa4f0296b8dd6714103a4bb89625ab1c SHA-256: 5eafd309cec972ab181731393424ee2a1f5db9ab134d0d891bcbc822074f2c85
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by both ML classification and ClamAV, flagging it as a phishing trojan. The document contains a large link farm pointing to various PDF files hosted on disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the link farm indicate an attempt to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=n64+emulator+windows+2020 PDF link annotation
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/giwulopisodu-waxobobulo-digasajisesedap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fce5cf1497d3.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/120406.pdfIn PDF document text
    • https://kesolijizik.weebly.com/uploads/1/3/4/2/134265964/netomizabezelopo.pdfIn PDF document text
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/sujokolupefeje.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/831247.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/8c11b8f41b8c.pdfIn PDF document text
    • https://kafigibedup.weebly.com/uploads/1/3/4/4/134479504/be205ac3f.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/wevenexi_kanawowa_sepesazaga.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/litavurax.pdfIn PDF document text
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/badowe-sefatof-xesiwinuniwil.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/vososasoxumete/zejedesedufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cbd1674-a5bc-4190-aa1f-208855dd2f2c/84141870437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d91bd70-27f9-4cb9-a60a-8dfc8e0c6d48/3320385424.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_off0000c985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC985 5548 bytes
SHA-256: e3d14dc74865fe4d32fa10ae160d32a740a0b80867d23efb5d3c2c57922b787c
font_01_sfnt_off0000dc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6F 10352 bytes
SHA-256: 0cd801a46202a82dd649b6037ea7781255b8f2f3c7b06bf01295055814b1e57c

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