Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c94869ef454b565…

MALICIOUS

PDF

77.2 KB Created: 2021-03-24 16:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2055029dc0d966099860c0297f55e668 SHA-1: 9dad69c2f01600b76850b01554972e4efc642482 SHA-256: 0c94869ef454b56515f532c29d10a5dfee5ab52c40785df33d283620f382c4b0
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 0.9990

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://pelibifir.ru/aws?utm_term=a+static+budget+is+useful+in+evaluating PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450502/normal_60554a5875d3d.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/abstract_reasoning_reviewer.pdfIn PDF document text
    • http://risimog.mywebcommunity.org/71440433282.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/puzutusuv-tofurag-zuzejebe-xopemipiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455381/normal_6045148c33c48.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/96UBhjq/cbse_class_9_science_syllabus_2019-_20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_602801e87c1e2.pdfIn PDF document text
    • https://bepopasexib.weebly.com/uploads/1/3/4/3/134356469/7ddcd779c1b1fc.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/e4iaRSE/livebuluwawoxiwutiluxok.pdfIn PDF document text
    • https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/7391450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_601661e9c0615.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/PjbYhir/nevovilutuxovin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421940/normal_5ff29e86ef1ef.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/P7hhggl/racing_in_car_2_2020_mod_apk.pdfIn PDF document text
    • http://vesajob.getenjoyment.net/pafitew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_5fed5872db24f.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/buvividudurovif_xudesuwejasokow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_6039107373db7.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/82710325649.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/650f2b6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426413/normal_5fd97a4dd1be7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_23860d3a82ac40bf9aa781dc883ca357.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_0d92fe68a1eb4cfcbd84fb65b1b56907.pdf?index=trueIn PDF document text
    • http://donijexufenu.onlinewebshop.net/jowutazuvunobegitigusipos.pdfIn PDF document text
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_53785ebcae0647e89f9a5dcf318a002e.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_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 5280 bytes
SHA-256: 95928c77c2c55839798a7f28b439ba31ef2f659dd3e6f1c46667d992d0efa653
font_01_sfnt_off000100ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AD 10776 bytes
SHA-256: 9b7131d3716470df81fd39ecc40ee0515265874c47a8e67716e50dfc8b00419d