Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45e7560bc8f8cc6…

MALICIOUS

PDF

71.5 KB Created: 2021-09-30 13:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 151ba934ed9ed93a01ce66bf80acfd2e SHA-1: 132cb51f34ffecbea9ac3d4b023c90bf9dfa0499 SHA-256: a45e7560bc8f8cc6dd9cd2e77fe315f19685463da654467d712d97048ddf21df
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains, suggesting a link farm or redirection mechanism. The file's structure and the presence of multiple external URIs indicate an attempt to direct the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ptaki.info/imgekoprojekty/files/89789771090.pdf In PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/fobenunuwaru.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/wuwubabewiwel.pdfIn PDF document text
    • https://petala.gr/userfiles/file/70351012605.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/jevanoxexefewonaximu.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/wipaguvesopiped.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4b6g5hsqevqacel425lcrcq393/60982436704.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/wawurunizomovuzerakorub.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/55963284207.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/34021000094.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/10891165246.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0911/e13ef7e33dc73ab913acd73cd042413f.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/34110441327.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/gazapoxopuburi.pdfIn PDF document text
    • http://fialki.su/xanumamaviko.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/38431861918.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/38745382646.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/tiwuvufu.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/lufebafe.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f7f90662c2ed10d37aa2d62ca4c0559d/tuwigusuf.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/30703983531.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/fumugizukiwu.pdfIn PDF document text
    • http://trieuduong.com/images/Download/sudipewudutemuvugak.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/sugafenarubirodavisilola.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=2+gomovies+toPDF 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_off0000b594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB594 17372 bytes
SHA-256: 6b31fb25c209bffb1c814f85669da01bf600aa20a3a80bd08d9abf69441dba6b
font_01_sfnt_off0000e19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19F 10128 bytes
SHA-256: f5ec70800a6b2b3e7d2f16fe52acdc780242eab715f61670aef41711e6d07068
font_02_sfnt_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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