Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c7bd95816da8f7…

MALICIOUS

PDF

84.3 KB Created: 2021-03-02 16:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b9869000248e012cc87bd725e275f878 SHA-1: 85e833d188d33521eefe29d02776292cb55a44bb SHA-256: 08c7bd95816da8f7be34407bad5d569d7b0498f4c9ace8136d5d01c6aa0c94e8
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URL 'https://nipisod.ru/strik?utm_term=chet+holmes+ultimate+sales+machine' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/strik?utm_term=chet+holmes+ultimate+sales+machine PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371014/normal_5ffeb1c47cc1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_60249126c0c67.pdfIn PDF document text
    • https://xaxuxogupovugid.weebly.com/uploads/1/3/0/8/130874119/veluwivazimab-nanazopovop-subixejuvamuko.pdfIn PDF document text
    • https://rigoxetevub.weebly.com/uploads/1/3/4/0/134017132/jazuzagupivebida.pdfIn PDF document text
    • https://rutedidatares.weebly.com/uploads/1/3/4/4/134490949/8769675.pdfIn PDF document text
    • http://mibejar.sportsontheweb.net/38845074219.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/fuxixinuxas.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/firowul_vumurukopi_xafeladuzefupad.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/xonasonovemola-lawadafuzax.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/87652486134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_600130f7bf8d0.pdfIn PDF document text
    • https://waramexebogod.weebly.com/uploads/1/3/1/8/131856917/9221185.pdfIn PDF document text
    • https://tekeginisexufu.weebly.com/uploads/1/3/1/3/131381150/sajilen.pdfIn PDF document text
    • https://fomutifimo.weebly.com/uploads/1/3/4/5/134594787/bazigo.pdfIn PDF document text
    • https://pexasuwen.weebly.com/uploads/1/3/4/5/134593650/5829165.pdfIn PDF document text
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/xebivelej-vujapixigop.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/faxip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425514/normal_60031830840c3.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/nujasoriwavapetivopen.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/sutawowirosuvuv/89932882274.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/24089204116.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/zowamed.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/alfred_lord_tennyson_ulysses_poem_analysis.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_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 4848 bytes
SHA-256: 3bec06f1f49049ecfd6391275c827b205e33648f9ff8cce4394b328e6fc12542
font_01_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 10948 bytes
SHA-256: b579a282f76d851f2baf1082caf2d5b0ccda0fcf9a42e18e1ebe148ec35ee085