Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a001a84218c8030…

MALICIOUS

PDF

82.9 KB Created: 2021-09-18 11:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5bb6fae6ceaf978e462c627e7d4d8e3f SHA-1: ceb7b54edc7e72da8ca01f67a26f7fc9cc7f979c SHA-256: 6a001a84218c8030164559b49512feb2b57be2b95f54c03124b2f08b236f9f39
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one that appears to be a redirector with a UTM term, suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm hosted on disposable domains. No scripts were extracted, but the presence of multiple external links points to an attack pattern involving directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://oniceh.ru/uplcv?utm_term=truck+simulator+pro+europe+download PDF link annotation
    • https://bharatceramics.in/ckfinder/userfiles/files/5003696649.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/53349957058.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42172247991.pdfIn PDF document text
    • http://swhos.com/upload/files/87081531881.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/39246744244.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/firexa.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/xakobutawesagesofatagideb.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210917_092245.pdfIn PDF document text
    • https://phu-komplex.pl/pliki/file/bowegusupanipitonegox.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/lazanugeriv.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/69547080449.pdfIn PDF document text
    • https://netlandschool.cl/files/faxizupitobutejorogimuvi.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/85051897082.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/66039557557.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/744057375.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161403814aa146---sudopatedoguzoxaz.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/murazesapukunevopajukimik.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/jegigajegorujuranofiz.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/56248501336.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/33c5bff86ef5f3c84119b4022242685e/66075524291.pdfIn PDF document text
    • https://zahrek.com/userfiles/file/26660926487.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/13333586212.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_off0000dc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC99 10916 bytes
SHA-256: f154800c6768dab9ab626737383c58fe6803c58695b764d404b9caaa8632a2a9
font_01_sfnt_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E09 18364 bytes
SHA-256: 037cef21fc41d615dc6707aef8790dbb4247a0f3e0f5f47f6938219a5d47f2a7

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