Malicious PDF — malware analysis report

Static analysis result for SHA-256 349b548c7e0836c6…

MALICIOUS

PDF

82.3 KB Created: 2021-09-17 06:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aef60d22b0de3f9860be82e5b29fa313 SHA-1: 41c4ce6155fb746444977f841119aa5fad925245 SHA-256: 349b548c7e0836c6a2864cbca4e55b3716c833b17511dd70e12ef0b1c886cdee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/3lmngbp061dlr4ijroqlhuddnq/32802322323.pdf In PDF document text
    • http://kielcenoca.pl/files/file/38639898981.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/luzitad.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/batobebemisotejaf.pdfIn PDF document text
    • http://machulski.com/public/file/lukugufubatupunenunikir.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/16810140781.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138427d95bb3---14947646151.pdfIn PDF document text
    • http://trevorhannant.com/xigiguwo.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/tarijaxuruvunarat.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/bamafuderebejanusexili.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/migot.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/4508904975.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/35968055886.pdfIn PDF document text
    • https://ottopianos.nl/files/diredoxenujotuga.pdfIn PDF document text
    • http://wirheiraten.de/images/file/10145121803.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/ranebapuxamaguxarukog.pdfIn PDF document text
    • http://santehnika34.ru/images/file/31713448640.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/37664548395.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/92265273835.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/867572610.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/35203780101.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/54083752290.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/71784421165.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/kijerogixulofi.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/23913631033.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=doom+3+apk+obbPDF 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_off0000dea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA6 17912 bytes
SHA-256: fc85c7f7a805420f2136c1025ef812b4244afded9cee986c1eb0e07b2e14e574
font_01_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 10080 bytes
SHA-256: c5c08f4cf877c22aecf808d5f9ca02f32117145c8fae9424500b1407b6adb462
font_02_sfnt_off0001238f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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