Malicious PDF — malware analysis report

Static analysis result for SHA-256 062dbb2a5260f408…

MALICIOUS

PDF

75.0 KB Created: 2021-09-08 17:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e005045ab9924dcdb7b7c1bc35d8818d SHA-1: e41257ebaf7e08b3a0693307ea989bbfb3392710 SHA-256: 062dbb2a5260f40806024205038649e70e91b2526a080364b18b22bf653042b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or redirection scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://zaiger.ru/img/file/rikewapobujupivodupixa.pdf In PDF document text
    • http://www.binghan.my/userfiles/file/32265573686.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/86403306075.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/mavuno.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/57477056271.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/tovufitapolixef.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/55341793633.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/rasuripemuv.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/vezezoxoperipawelajil.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/romugepeputapadinokakuri.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/muriwudutoz.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/vedemarisomozamoz.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/1728171762.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/kexewixunusasexabowud.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/35895309437.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/91912022084.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/pefasenefud.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/41471155530.pdfIn PDF document text
    • https://melz-feu.ru/upload/sinilowitorefan.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/gipimikivu.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/332a9440919e1776a34672e7abd90af3/fabilo.pdfIn PDF document text
    • https://isuzuphonoi.com/data/dulieu/files/13823636168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=sentimientos+de+la+nacion+pdf+completoPDF 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_off0000bef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF3 10756 bytes
SHA-256: a034d982fdcd2d6c06efc5b7d930c0f7e685c045e59b42202bd3de235c42e533
font_01_sfnt_off0000d7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AB 18132 bytes
SHA-256: 203640da0dbc890859c65886c953a6655ad93aa5935be06cf9dde4571f0069d1
font_02_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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