Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e32a18b3051132…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 07:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0e62bb29a7e1c3c14ab58b4bec86d6a4 SHA-1: b35b65b32a3d334ee04b6687df626745e5ec53df SHA-256: 32e32a18b30511323a4cb6a07cc02462f80805d812753a0bc1574feaceca4c48
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm designed to redirect users to other sites. Multiple unknown URLs were extracted, suggesting a distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://yjsyrj.com/userfiles/file/defadeg.pdf In PDF document text
    • http://royalwedding.jp/images/blog/file/laroxa.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/57183164304.pdfIn PDF document text
    • http://platcometals.com/images/file/6651682952.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/pifulekej.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/1456111348.pdfIn PDF document text
    • http://domario.ru/userfiles/file/xevolid.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/nimarepojekuren.pdfIn PDF document text
    • http://flirdining.com/uploads/files/pabalanebinato.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/kewowaxexubiropuka.pdfIn PDF document text
    • http://compsult.net/userfiles/file/74876084855.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/161304dcbf0efc---punub.pdfIn PDF document text
    • https://esvigo.com/upload/files/suxewisijal.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/posisekixitavived.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/22941881599.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/20652080888.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/30547477845.pdfIn PDF document text
    • https://senarathgroup.lk/assets/media/file/dixadujetebevipox.pdfIn PDF document text
    • https://stvorki.ru/files/file/67027287088.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/defv5adhqp78svv6ubfth4ooqc/53849569339.pdfIn PDF document text
    • http://taxfreepoint.com/file/kivozunamugobixofitikafor.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/54850718055.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/jaligegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=advertising+pop+ups+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_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 18884 bytes
SHA-256: 5df335fec60ead9a2e417d4473c568262fd8e60c0582718f8cd36c432e9bd3ba
font_02_sfnt_off000122b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B2 10668 bytes
SHA-256: f378690e462d289aedd453b443e296d5c2b4f179a604aea0b461915706723bc9

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