Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec732d37f08469b7…

MALICIOUS

PDF

80.2 KB Created: 2021-04-13 22:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4b09f7199c705222fab67ac72f17ffcb SHA-1: 915e39b74124bf9cc14ce783c5dea98b9bc541c7 SHA-256: ec732d37f08469b79f7086807fb993fb3ec1e71b3e218590c7c4703da6fe7675
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=ryobi+miter+saw+home+depot PDF link annotation
    • http://custits.space/firaleza7wa.pdfIn PDF document text
    • http://argo-tourism.com/445597778355vgoj.pdfIn PDF document text
    • https://safejabev.weebly.com/uploads/1/3/0/7/130739713/gidojovomonolida.pdfIn PDF document text
    • http://com-servers.online/cell_and_molecular_biology_major_usfqn17i.pdfIn PDF document text
    • http://solapp.xyz/lamakovudamufuximojo7s389.pdfIn PDF document text
    • https://kapadarobuziwel.weebly.com/uploads/1/3/2/6/132696145/8840726.pdfIn PDF document text
    • http://rankingcoach-seo.com/how_much_does_a_finance_makemups5.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/godek.pdfIn PDF document text
    • http://pop-marketplace.ru/4890190307zukg3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454435/normal_6013a102c8d99.pdfIn PDF document text
    • https://kijeluve.weebly.com/uploads/1/3/4/2/134266469/4509229.pdfIn PDF document text
    • http://tryadasert.online/667926542766lwld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_6027edf00c687.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452863/normal_5fedc353be028.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/5351439.pdfIn PDF document text
    • http://instapriz365.site/3667453660887kzg.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/ac02daea1.pdfIn PDF document text
    • https://xibomuwupipufa.weebly.com/uploads/1/3/5/3/135389044/432aec8443c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wivunonovef/35019071016.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/report_your_concerns_about_a_child.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/pufupugukaposanilidibola.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 5188 bytes
SHA-256: 802360f9bf09786929e8b827ff5bfd8ed6e6fce735067488bc173f2a5a09ac20
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 10960 bytes
SHA-256: 62268fabecfae277a4575cfd0836654b2b4903de07451850e263798b6985c162
font_02_sfnt_off0001253c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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