Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a2c38a9e5fc8dd…

MALICIOUS

PDF

87.7 KB Created: 2021-09-10 14:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6f8b4bdb4469cbee19f0824cfe93a68d SHA-1: 5c5e8a273e44e155e89de2a7607a6f3be6b62ca9 SHA-256: 74a2c38a9e5fc8ddad5a8e0051d357b29d5a7c09d97ee14d2e00b6ece728c1c7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable hosting and appear to function as a link farm, likely redirecting users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to obscure the final destination through multiple redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://philabc.ru/uplcv?utm_term=us+horror+movie+free PDF link annotation
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/51325753001.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/nozikimofawagafa.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/jides.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109080722004223.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad6435a33d---37785939367.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/75377750111.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210908070756_kgnk64.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210903_FF131C6AAF84172C.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/padebejozomobuwukezaje.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sagojoxebobazakosokoset.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/gogogolusof.pdfIn PDF document text
    • http://mdtrend.hu/files/file/41992684373.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/risesidolu.pdfIn PDF document text
    • http://lovesenergy.com/file/48015768416.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/43350903477.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/55905550552.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/59590806723.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/70670403513.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/50643482866.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/60030503050.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/metedirim.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/62618590929.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_off0000f4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 17844 bytes
SHA-256: 0ef4cbc5cfe40457acdd398c5d929ab3bb323628993ada7a5642c86820f5a910
font_01_sfnt_off000122db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DB 10144 bytes
SHA-256: 71e3dc6a482773a7032cc178b9db2381206d8a9bb82a42f1acf6bf298b7f3c71
font_02_sfnt_off0001398a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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