Malicious PDF — malware analysis report

Static analysis result for SHA-256 b448aafd9a47c9fa…

MALICIOUS

PDF

82.6 KB Created: 2021-07-27 12:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30bad767799a5f3e4580de1d32ea4737 SHA-1: 7c91e9f764f14e642e0776076e7c8bb42fce2dfb SHA-256: b448aafd9a47c9fa789d07e7f58fd2103bcf88ca479df3552697573f83166f43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The heuristics identified the document as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc83b3409f---70615313751.pdf
    • http://pekingtogo.com/uploads/files/83200156018.pdf
    • http://georgekoldun.com/var/upload/file/sovetepunoti.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099567ada04a---35530083095.pdf
    • http://penzionriverside.cz/files/file/mitera.pdf
    • http://oreade-breche.fr/userfiles/file/26136795332.pdf
    • http://project-st.ru/userfiles/file/98261778700.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/r7jj7edt236hdvqkvgmbhp9bs0/75763349939.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/3e88ff51d243d22b8f7b57c94c81bc93/81872029406.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5890016ccfdfbeaf2bdda79a61388d44/kejuvafanatetazigopa.pdf
    • http://www.jindatunnel.com/up_files/file/76702149609.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e953d2edd5---34636612638.pdf
    • http://gps-ambroisie.com/ressource/site-image/files/84822381981.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/7leu34dsd4bqqe7iq3pq04tes4/21145090134.pdf
    • http://altaprecision.com/userfiles/file/96159311271.pdf
    • https://citytrafik.nu/images/file/nokefuv.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160af97b8c502d---nojonovinupikelule.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/lchlekpfnjt7emdl242u47dmem/zulavulogizibumog.pdf
    • http://bagiez.com/userfiles/file/tusufemedajeduzijodumo.pdf
    • http://bannhuaduong.net/upload/files/sazawe.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d7ec98132413b7cc566f5e8683a5490/68072079045.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/75eddc962b4890089d0192df5c11fc6e/22983249924.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f030ab7a58---66884692958.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=calcular+mascara+de+subred+personalizada
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de64.bin
7698a9cca2b58157eba344e19da1cc7a3813032e52b8fc9e8ed5779df8a7849b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 17600 bytes
font_01_sfnt_off00010b66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B66 16792 bytes
font_02_sfnt_off0001237d.bin
cdd7ee84c7a3e72c95fb45918cf99a41e5ccf5be413297e130440a6a1c67a46c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 10908 bytes