Malicious PDF — malware analysis report

Static analysis result for SHA-256 994203e556754a43…

MALICIOUS

PDF

76.5 KB Created: 2021-02-27 16:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f7435c58b5e1821248e180ad7b3c1492 SHA-1: 07335b19cd03a8dad923539d52e97d79161ac552 SHA-256: 994203e556754a438209bed05b5fce3191d1ac8c0ac2ca4d004a82af512179c3
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to setup guides, suggesting a lure to trick users into visiting the malicious URLs.

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
  • 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/wix?keyword=blusmart+bike+computer+setup PDF link annotation
    • http://luwinilulurop.mywebcommunity.org/vokadurazana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501045/normal_6013af72ca47e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417525/normal_5fecc032c6bfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445326/normal_5fd696f046279.pdfIn PDF document text
    • http://particulieres-societegenerale.best/ayyappa_naa_songs_2019xiafw.pdfIn PDF document text
    • http://draiwenstore.online/lozorosonufadume3uqnt.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/triumph_bonneville_service_costs.pdfIn PDF document text
    • http://misudijawalezom.22web.org/69574646825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402247/normal_5fcdfe36eefb2.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/47665854456.pdfIn PDF document text
    • http://antonioit.fun/how_to_delete_google_search_history_from_android_phone_permanently0pxf4.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/tokisaxororuzopevipojiril.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/sitozi/leotard_pattern_free.pdfIn PDF document text
    • http://mamesejo.epizy.com/bachelorette_itinerary_template.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/turuzuxexikunomuf.pdfIn PDF document text
    • http://lorajazibosiner.epizy.com/loose_lay_vinyl_sheet_flooring_menards.pdfIn PDF document text
    • http://damewanobojojo.rf.gd/sometuxun.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_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 5332 bytes
SHA-256: 769fd0fd2ee4fa7cca7d98c78a70d7ec88a2b2add174a19227538ab5d73c9da8
font_01_sfnt_off000101fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 10216 bytes
SHA-256: 359432e61a33399086f2c910e7401b5c7ded24df67cd33fd1f42d521a306372f

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