Malicious PDF — malware analysis report

Static analysis result for SHA-256 9003a89dbcf98c06…

MALICIOUS

PDF

81.9 KB Created: 2021-09-18 00:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 339dddc4402b75b7d9cedc672fb41875 SHA-1: a5c23f81db2776d8ad47aad6f0e9d4f6d27302ba SHA-256: 9003a89dbcf98c06ca08b29afea6398f28587fe93484783eab58efd870e1061f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and the presence of many external links suggest it's designed to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161394070a0a4f---32690944289.pdf In PDF document text
    • https://gujaratisamajparis.org/upload/files/dufedu.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///27483460331.pdfIn PDF document text
    • http://hibertek.com/image/files/20210904_081445.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/jibotadukeribigamezezemi.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/weripusifipoj.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/93664526890.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/vizagafepurajojariz.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/88493447848.pdfIn PDF document text
    • http://e-hematologica.pl/users/file/kebifezurefetitikutujovev.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/xojure.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/nugojagomu.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/tusimibomujizunemutenolo.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/wafojigitexan.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/19661427863.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c570a3542c257c4a0765d3ccdcf45491/nizuxutiguwul.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/bujosogug.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/vixezalufakopomeviw.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/gipetoxipezum.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/37575096058.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=purple+and+brown+makePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 10616 bytes
SHA-256: aae777ad624f7bf02dcf8ba7199aaaafabfbd6f6388842839d53f52d8cef1a6a
font_02_sfnt_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 16960 bytes
SHA-256: 6c595be42551f3a97c2f6da33bcb06c18ec2ce89a1f7a44e31f31c8e4405588d

Open this report in the interactive analyzer, or submit your own file for analysis.