Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ecf21db6a0df16…

MALICIOUS

PDF

75.6 KB Created: 2021-03-13 23:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ca12d338f20a3ffdda0f555dd74da3fe SHA-1: deeca0742c641152f3c885ab97cfa98fbec86af8 SHA-256: 06ecf21db6a0df16b18b1c6a72c820db0beb6332ab7109da140aa0aa2b6b6432
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One embedded URL, 'https://gimoguvi.ru/strik?utm_term=kenwood+dpx500bt+change+display+color', is likely part of this scheme. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=kenwood+dpx500bt+change+display+color PDF link annotation
    • https://sidunijutama.weebly.com/uploads/1/3/1/1/131163786/pavanodago_waragupigagus.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/3cd283c12131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5ff0a5c57df89.pdfIn PDF document text
    • https://fusodozot.weebly.com/uploads/1/3/4/0/134096428/c6147762dc6e0d.pdfIn PDF document text
    • https://vasoderavir.weebly.com/uploads/1/3/4/7/134728489/1547077.pdfIn PDF document text
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/wekak-xufilegus.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/is_the_fallout_series_overseer_dead.pdfIn PDF document text
    • https://kawawipebezuvo.weebly.com/uploads/1/3/1/4/131409621/425865.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/tuzefezaz.pdfIn PDF document text
    • https://josaboduzez.weebly.com/uploads/1/3/1/6/131637311/gezirenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479235/normal_601443088e772.pdfIn PDF document text
    • http://fevofawemuwa.medianewsonline.com/is_soundbar_good_enough.pdfIn PDF document text
    • http://xuzobinemipivor.mygamesonline.org/lupeguxejabijifabupesefi.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/da882b3e8d2df.pdfIn PDF document text
    • http://selizixid.iblogger.org/wipabifijodakiviferej.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/juxoduzot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pukifewilafeb.epizy.com/morapodofeviros.pdfIn PDF document text
    • http://forubav.rf.gd/medical_terminology_prefixes.pdfIn PDF document text
    • http://dogazuzi.epizy.com/ember_spirit_guide_7._22.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/83020008072.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/wivugugelexupezufegaxod.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_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 5972 bytes
SHA-256: 96268b32a72c332e92345bc8dd561360bc35a2c43b51c041fcc9ced5af2aecdb
font_01_sfnt_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 11192 bytes
SHA-256: 0e6f881ed0d8a3fa13b9bb6ca8b45de70f333ee4d1c0040e8a821e8c05ee23a1