Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cdd69426157235…

MALICIOUS

PDF

76.5 KB Created: 2021-09-14 10:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a21187948634ba596622eade43171c41 SHA-1: 4a1248a4d3a40553940ebec98afa23f1a30207e0 SHA-256: 14cdd69426157235155e4a9f53dd851a587b108265ffcb8a9d33c7b6ecd96bfd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are indicative of a phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136620f82b26---64995922850.pdf
    • http://vin-baietii.ro/ckfinder/userfiles/files/takijejado.pdf
    • http://opusincertum.it/userfiles/files/balobabikokakagotojuvasem.pdf
    • http://emanuelarombiarchitetto.eu/userfiles/files/zedamoriwozibirabatude.pdf
    • http://bertoniamministrazione.it/bertoni/public/file/mugoxo.pdf
    • https://lombardpruszkow.pl/local/userfiles/file/80477856338.pdf
    • https://braindevelopmentmaps.org/userfiles/files/zumajab.pdf
    • http://hotdeals24x7.com/ci/userfiles/files/49008105724.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb00f0b202---mubibamo.pdf
    • http://strandedtattoo.info/file/72057153648.pdf
    • http://cathugo-yachts.de/res/wysiwyg/file/90752070899.pdf
    • http://3bbb.fr/ckeditor/upload/files/ziritepejufenanosavet.pdf
    • https://dwitunggaljaya.com/sitefiles/file/kobigila.pdf
    • http://kolbiko.com/images/uploads/file/73505431480.pdf
    • https://aronabritcan.com/userfiles/file/14147779853.pdf
    • https://masukpt1.com/contents/files/24712964307.pdf
    • http://ipublicity.cz/data/file/99403152087.pdf
    • http://autosoftware.company/autoresponders_images/files/69521807547.pdf
    • http://marta-galan.com/files/varios/file/jugalajaxofuwavososamiver.pdf
    • http://jeykrishnaclub.com/images/file/bozowanimulapeba.pdf
    • http://hansungidschool.com/userfiles/file/sinavimevewawilawuk.pdf
    • https://iqrainternationalschool.org/_assets/files/46716565164.pdf
    • http://atek-ent.com/upload/file/7197589000.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=minecraft+one+block+skyblock+pe
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D9 16792 bytes
font_01_sfnt_off0000dceb.bin
0e7ed6fa74efb69ceb864105635ca3a0d56fd848c3b0d572b352f8bd1233797e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 17968 bytes
font_02_sfnt_off00010afe.bin
bef68130744c6670dc37bd29f1255f744f29cf8b8829b9610a0ea9659b3dbe2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 10812 bytes

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