Malicious PDF — malware analysis report

Static analysis result for SHA-256 c586f9bba9993265…

MALICIOUS

PDF

88.5 KB Created: 2021-04-14 23:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0ae2dc0b3a5971bf003b40b1d0a3106e SHA-1: 7ee0070309308650632738b0e8de09cd434d946b SHA-256: c586f9bba9993265bb01919a2b30cd216a358ef4023165cdeaec887da44b8875
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to various domains, many of which are hosted on disposable or suspicious infrastructure. The primary link directs to a known malicious redirector. This suggests the document is part of a link farm or phishing campaign designed to lead users to malicious content or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=what+order+do+the+house+of+night+novels+go+in In PDF document text
    • http://bajifepeselok.sportsontheweb.net/62411794457.pdfIn PDF document text
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/zukaf.pdfIn PDF document text
    • http://visiblawty.com/ovulation_calendar_app_freetlvki.pdfIn PDF document text
    • https://povewagefafede.weebly.com/uploads/1/3/4/8/134888055/771d2.pdfIn PDF document text
    • http://instapodarok.site/93045772618olr0p.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/piruviwevegoxas-kidipopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_5fd2d01d5768f.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/1293504.pdfIn PDF document text
    • http://medyayazilimtr.com/gusogaxyabjc.pdfIn PDF document text
    • http://summ-ita.space/o_que__aneurisma_fusiforme9q8gn.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/tips_for_public_speaking_and_presentation_skills.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fd05f2cc70ac.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/70645851829.pdfIn PDF document text
    • https://visameme.weebly.com/uploads/1/3/1/6/131636817/97af1fa91a0d51d.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/casel_wheel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473637/normal_60659d9b1232d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389107/normal_5fce42f238ffd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_43ff2407e6e943789980849261dc9f47.pdf?index=trueIn PDF document text
    • http://mapesag.epizy.com/mutual_divorce_application_form.pdfIn PDF document text
    • http://nozabikuj.rf.gd/the_daniel_plan_app_for_iphone.pdfIn PDF document text
    • https://49884795-3b66-401c-adaf-b59e999553af.filesusr.com/ugd/8bd6c9_eabb4edfebf94429916f96b2eeb01e2b.pdf?index=trueIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_d6ca64d70a4a467d9e19792d07ae9310.pdf?index=trueIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_dd258d7272c64702bc40db9355e9c2d4.pdf?index=trueIn PDF document text
    • http://nijarigu.onlinewebshop.net/85714198486.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_off00011c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 5240 bytes
SHA-256: 92e53702975af1fff0620da547cd55c6662138695433ba8fcc7fc53cd4c1a87f
font_01_sfnt_off00012e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E53 11196 bytes
SHA-256: fe324f1395b6d51a62fcd5a68bd05604db8992d14ce9460b80590e30f5484a3b

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