Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2800aeab87f6db7…

MALICIOUS

PDF

84.6 KB Created: 2021-09-09 06:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fdaba7f18e1f34dacf9a772d54240763 SHA-1: 621ad718f5a7c50f5f86ee5dc1a126405b44a065 SHA-256: f2800aeab87f6db7edb51231f9f818f10d316fe2e7de0de9c4fc9b70a75bafe8
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded content are consistent with attempts to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wastran.ru/uplcv?utm_term=puzzle+quest+android PDF link annotation
    • http://studioagm.it/userfiles/files/28677180853.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/35269488602.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/zeluvutiwelavoju.pdfIn PDF document text
    • http://motocams.cz/ckfinder/userfiles/files/96183195019.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/34843875561.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/27381736671.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/kopopepezesu.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/lakowunawuzaxaxera.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161369bd82210c---wukugunogo.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/bemaxitisini.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/7034052023.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/11804081935.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/35663454084.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/36649818637.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/17929539019.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/kufakejesanosanaxilexakox.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/wefazatawom.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///3302052959.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/nogebipobog.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/79996858611.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/76380992724.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/29333315804.pdfIn PDF document text
    • http://caramelitos.sk/files/59233308568.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/wuvebup.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://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_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 17256 bytes
SHA-256: 2c41d18ca4d2fbbcfe6b458b04aac4852e2105a6ba61375254ff5068a1988d80
font_02_sfnt_off00012cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF6 10548 bytes
SHA-256: 8717f9a943600f74313b99a456e69b982c365e67f0b8302ba5fe0078e361c84a

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