Malicious PDF — malware analysis report

Static analysis result for SHA-256 9caa0c2450ee186a…

MALICIOUS

PDF

84.1 KB Created: 2021-06-29 21:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af990125843c48e818fd93697996d7f0 SHA-1: dcc6cac79a33e152d3afb9573e19f5ad2efc874a SHA-256: 9caa0c2450ee186adc13bf5a4fcc1e388d433f3ea094c76b1ef91b1f78187d0a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other domains. These links are likely intended to host phishing pages or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2e5318d96---wopinosefafavokud.pdf
    • http://ogbchurch.com/clients/880797/File/42596347408.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8bdb8da20---5362300087.pdf
    • http://hongdanhaudio.com/luutru/files/26344955691.pdf
    • http://thementalhealthadvocates.org/files/userfiles/file/kaduwef.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/b3dedd94fe3074aea6312405cda89eb2/pewadisipokum.pdf
    • https://aquafilling.com/userfiles/file/98200985153.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/na1ia87jekudp1fn5tlio7crrf/2701440002.pdf
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/45052336383.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/728cc1c25bb548ece5fbeac7fec24b05/relizawawele.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070885b7f637---zotubelesisaz.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/d4etc9a8ir64nipc1ncuhlpq3e/37336621375.pdf
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/xijorijamovog.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6283511818---3110686265.pdf
    • http://reicar.dk/userfiles/file/54311963545.pdf
    • http://wojno-stal.pl/pliki/file/xoluduwotivewexidowutos.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/78441ac00e22b1931d1df94b5c903b5d/lobumenetelobinadaxesij.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/282fbbb86168cc0f52bd085d96f345ec/92548088270.pdf
    • http://shinies.ru/img/lib/file/lareguka.pdf
    • http://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/72058878620.pdf
    • http://arslanemlak.come/file/13125928837.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=famous+french+impressionist
    • 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_off0000e7d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D6 16792 bytes
font_01_sfnt_off0000ffed.bin
b529923babf89e24e7abc668b6ee5d2d31477aca9f38c8a182c1af0f62fd6fcd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFED 10776 bytes
font_02_sfnt_off0001188a.bin
1120b305059506a38ee8816ccdb9527b8b0282a7b60885ec78921fec5eef3420
pdf-font-stream PDF embedded font (sfnt) at offset 0x1188A 16816 bytes