Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af92d19a6b3069d…

MALICIOUS

PDF

70.8 KB Created: 2021-09-16 23:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fed5b192befef6369f95ef5693062228 SHA-1: 356ecce81d01ba9307208e9b1c23c437281a5623 SHA-256: 2af92d19a6b3069d68e3998cfb36d21cee3627e2030bd04d224790090509e1ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to potentially malicious content or link farms, suggesting an attempt to redirect the user to malicious sites. The PDF structure and embedded links are consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://himarco.ir/basefile/himarcoir/files/88912502195.pdf In PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140e17faaeb8---43030974506.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/36330401846.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/09/20210904125242.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/dogutujuzevisud.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/nuxepaw.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/gomuluke.pdfIn PDF document text
    • https://altsovmun.ru/userfiles/file/lifozule.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/11263212814.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613908cc38b8c---xijolavagex.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/36379451453.pdfIn PDF document text
    • http://philipsphotographystudio.com/nidukitufavebevojuze.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/46169637037.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/96059840940.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/27558461609.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/11670088334.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/juvojotokinijoduwusiz.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/godubilefokerizij.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/livebakowevegaluwiw.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/14325871570.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/26404576038.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/12611657843.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/69104390617.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/84305171609.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+make+bigger+keyboard+on+androidPDF 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_off0000b4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B6 10800 bytes
SHA-256: 1dc45907bcb450cdf70a4270438e9d17c5f54a65f8a97f85d15256f349d54a07
font_01_sfnt_off0000cd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5D 15756 bytes
SHA-256: 02d2f0d93a9031fec0943a119d87bfc6335c48b9df57a310e74065db4432b7da
font_02_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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