Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcda68a11fcd72c…

MALICIOUS

PDF

67.1 KB Created: 2021-02-12 01:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 18090c027fa7440734ff133b79236422 SHA-1: a4a4fca6be8d978495c6a7fb49a15efa084f8ca2 SHA-256: 9bcda68a11fcd72c8419d85dceb7c862e13627efca88f279c7b758d42482a3d0
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to 'tanning bed goggles for sale'. The presence of multiple disposable domains and link farms further supports a phishing or scamming intent. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://crophysi.ru/wix?keyword=tanning+bed+goggles+for+sale In PDF document text
    • http://topuniversityru.fun/33179357921z392.pdfIn PDF document text
    • http://naturmilans.fun/61533728816audpi.pdfIn PDF document text
    • http://lnstagramoriginal.com/572133124983se12.pdfIn PDF document text
    • http://konanozopesan.22web.org/lezosonofowonitigote.pdfIn PDF document text
    • http://copyrightnotices-form.com/55756284303n909.pdfIn PDF document text
    • http://naturfresh.fun/calluna_sans_light_font_freejoceb.pdfIn PDF document text
    • http://zilijakal.iblogger.org/bakegesesorijodokuxikilo.pdfIn PDF document text
    • http://biweekamnf.com/adele_skyfall_piano_sheet_music_free3hvo3.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/4602297037avbcp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenigaseze.epizy.com/ranudirovuwukira.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/aaron_blaise_brushes_free.pdfIn PDF document text
    • http://povezemusugag.rf.gd/7761664892.pdfIn PDF document text
    • http://lepomosafajuki.rf.gd/miwidizujipobewuge.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/tareg.pdfIn PDF document text
    • http://xepolowamozuxan.rf.gd/firefox_52_64_bit_free.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_off0000c740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC740 5164 bytes
SHA-256: 4c05eaa0d113f4d9747503febbe202b8fb31aa5f59b15c6caa72bfc68c49f044
font_01_sfnt_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 11220 bytes
SHA-256: 7a46b7904f2bc045c4d1b076dcb141da447614fe24b35743c467b3466d3b9c41

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