Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f97091335f5cd8d…

MALICIOUS

PDF

68.5 KB Created: 2021-09-29 00:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 80bd9affdcf510774c72ceb5b78d2e23 SHA-1: c8122f77ba35b75583256f6e5ee102c0a40c3e89 SHA-256: 0f97091335f5cd8d095a680bb150054e86ef942a2ba05d8a4f40c3b2941e2ea2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://kerama.altrodesign.eu/ckfinder/userfiles/files/mapiwawezedexotupamelede.pdf In PDF document text
    • https://angkortaxiservice.com/userfiles/file/xakepawumatem.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/guxupukox.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/78170123045.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/kapebuto.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/satuvajuwejijapizezo.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/tezitazixokidarasoti.pdfIn PDF document text
    • http://plaschke-partner.com/uploaded/file/rawumikik.pdfIn PDF document text
    • https://spa-salon.ru/ckfinder/userfiles/files/jakuz.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/rokeloluni.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/fuwaratiziragunesuzej.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/6138849143.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/moluwekozotifuxo.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/67412050446.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210910090345_1753966627.pdfIn PDF document text
    • http://aibrpjoaae2.specialty-match.com/upload/files/34973015139.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/88299479608.pdfIn PDF document text
    • https://proxkimya.com/resimler/files/29236754135.pdfIn PDF document text
    • http://xinnethk.com/userfiles/file/lavuji.pdfIn PDF document text
    • https://ana-jsc.com/upload/files/nazadijagejipojuje.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/62036661451.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/75055863314.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/jipokokilorupuvukoguw.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/kuzuvej.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/73909511504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pacman+online+unblockedPDF 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_off0000ae0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC624 10496 bytes
SHA-256: fa0ad9141b912eefb27611de8e002b444cc64acd41a0ac2a6b9850ee42cd623d
font_02_sfnt_off0000dde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE6 15344 bytes
SHA-256: 2c65c7ea09d811c57b0e6e3a7919c3ca5aa0ba54d55313524db6b0e7b34fa6ba

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