Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b1f0f4775c2e1b…

MALICIOUS

PDF

82.8 KB Created: 2021-05-23 02:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c2cc8c2bf7359ba2d4e2409f0b61dec3 SHA-1: c383311177e5635faf3244d232aa3c37452666a4 SHA-256: 83b1f0f4775c2e1bbc951265775882d4839c4eca667f1c2c3a98e6a1b39c906d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary link pointing to a domain associated with a liver cleansing topic, suggesting a phishing or scam lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://maypoin.ru/strik?utm_term=how+do+i+cleanse+my+liver+at+home PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415537/normal_600a233c7b8a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_60297d097dcc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_60461a082d287.pdfIn PDF document text
    • https://vososodimeditu.weebly.com/uploads/1/3/4/5/134599865/eaa163cd30c.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/rarifozutijutuxex.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/lekugoxasedoxam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410717/normal_5fedc5c74a567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fe8b7bc66b8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5ffa7edc15667.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/batiku/xepirakuvavofito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819c907a-b69d-4ef5-9588-88d2d371f821/zexazug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5165c646-4881-44d9-9bf9-aadc350fdb98/61185182005.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c00b25-a885-4a7d-8e9f-6654973b0320/96126781859.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/24236484322.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/assistant_project_manager_salary_seattle.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/crazy_zombie_6._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc43cd4d-eaba-4561-996c-639eaadeb552/install_primus_iq_brake_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81eefb3-20b6-429e-8d81-d45f4f436525/59668039648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c7819b-a8ef-482e-bfec-3c96f825ab71/60129492782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7922356-0a50-4b36-a1dd-fabd3ff8cf75/legexulorosinijasatinativ.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4160910-2b4e-410e-88c0-14f0b7eeb4a1/what_does_the_meaning_of_like_water_for_chocolate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491e644c-d620-4155-bb1c-67b5aea2dcf6/30783722481.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/ruvosonuw.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_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 5392 bytes
SHA-256: 747c85ff0d80bea889aa3688fe22fb2caa00872338d4e669375885bda9d6b64d
font_01_sfnt_off00011084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11084 14220 bytes
SHA-256: f2065debfc708786a7a0cb2b5ae37e2c91aaf17da6912ab04917a19cff9eef69

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