Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffae1ba09b1233e9…

MALICIOUS

PDF

63.8 KB Created: 2021-06-17 15:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 17dadb8182b39f3ca4ab111b763afab8 SHA-1: 6daff9c5a2809c36711f74716966020f18941ad3 SHA-256: ffae1ba09b1233e9cd7bef32e47ed8b874a752520a599bd3402c42ba7e4c24d9
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a common pattern for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8593

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://philabc.ru/uplcv?utm_term=he%2527s+a+pirate+violin PDF link annotation
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/surepelakaput.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/31477331122.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160851427ab64d---61808687964.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c628c75c646---80738598248.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1622867092.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/5802329fc2d0c7e726bdde05acf1080f/gumipobamexilokuwera.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1d2c845ed---64223467387.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/3774231b1da1c92c6d91431bfd526d67/wadepaj.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6e2e8b557308baa9fa5b9c6755beb1e1/89557105760.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/nugosenifuzidiruzinixofe.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609338c0a78f3---66038283207.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/0uesdqg860alqrfks5qq87d9uu/tamaxexixaxo.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/0ue98827fqln0q7qne0754jp40/79513226074.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712a7cf138b---bofolusabafudunibopof.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/0h6ofrf784qrmjhil6k12hokge/33295909035.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9e8f46df2---63301148552.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ccd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD2 4868 bytes
SHA-256: b30316c0fc8874e2520573d32ea664904b5b3a213969c1f40389ea6e3fd5d744
font_01_sfnt_off0000dd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD79 11784 bytes
SHA-256: 09ea0b4c40724f32cb64ae97787aec1ef83177bb2e502eeb8d26efac970286f9

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