Malicious PDF — malware analysis report

Static analysis result for SHA-256 901556c7b5b9d3fd…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 05:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 069dfe663c7b6f25299b7e768f6f3df3 SHA-1: 71f4ad80a9214b4ff4ce1976b69992cc75475236 SHA-256: 901556c7b5b9d3fd275a62d92fdaca9e42f31512be1fa8c47bef525d6cabbb61
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0, and ML classification strongly suggests maliciousness. The embedded URLs and the nature of the heuristics point towards a phishing or malware distribution attempt.

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://lozipotod.ru/wix?keyword=canyon+furniture+company+student+bunk+chest PDF link annotation
    • http://waranijovuv.sportsontheweb.net/wigewopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486751/normal_5feb5b9a7454f.pdfIn PDF document text
    • https://nalufubuxozukex.weebly.com/uploads/1/3/4/4/134479837/6872667.pdfIn PDF document text
    • http://love-your-lips.online/kenozulave4ccgt.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/4576417.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/cause_and_effect_essay_outline_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5fe415e53146d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_604cd51aaa3e8.pdfIn PDF document text
    • http://techanomic.com/kavemumcddy.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/zusixejedenixupajelawiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450419/normal_5fefd233d207f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_6039c6457be2c.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/visuzo.pdfIn PDF document text
    • https://nilizexuv.weebly.com/uploads/1/3/0/7/130739046/0f906a7e5.pdfIn PDF document text
    • http://letabumo.getenjoyment.net/reality_is_broken_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_9b13f48b645546e0b2f2f934863f7303.pdf?index=trueIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_8da6c297a0364ab18bbaaab0016c8bb5.pdf?index=trueIn 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_off0000ef12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF12 5572 bytes
SHA-256: f0a4f4903669ac80e69462559cb0e7826fc7d765a6192cf4050ce2dbc5ff3a45
font_01_sfnt_off000101e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E2 12652 bytes
SHA-256: d0a8275eab211eaf6c06400b6f164b00c77a01c91765bd4193e4d915726883f8

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