Malicious PDF — malware analysis report

Static analysis result for SHA-256 07846867e486c480…

MALICIOUS

PDF

155.3 KB Created: 2021-07-03 16:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 044eefc241422af7609cb10107319b3e SHA-1: 469077be7867c0aadeb2a23c421e1e67bae10d7c SHA-256: 07846867e486c480cbee7927459660bb2bea585ba1833c432863c642948a8da8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites hosting other PDFs. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document text may contain elements intended to execute commands, possibly via embedded JavaScript, which is common for PDF-based phishing or malware delivery. The primary goal appears to be directing users to malicious content hosted on compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609df354f077c---zuxosupagu.pdf In PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/863eaf6978a2c6a911fd99c052048f73/98574041374.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c22374de6d---zupujupodogaximi.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/76185160620.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/5657914fcd1ca1022fe47f2f1a31dd1a/86515417795.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/bpocmdppnqmsimb22i0lsueg81/bezekulofopotuzolo.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ac2f5962893513096b95bed7ddbada3c/18308826613.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e1e1620549a570daf62f6ab7f65f94e1/girupara.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16088ecc1775ee---96566715089.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf45cb70a1---peruduvizavexod.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/foboxanutokuzusata.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/52790373991.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/kipodexotuma.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/wexasudokado.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/c7dd6616b54591c54209c6bb6c84ed0d/dezeduwigip.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab1b35d015---wavewoximuragatubonabu.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/48352192427.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d088904ec1---74600986101.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/46691504572.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0016b4c39---58705522430.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba3564d39a---tagazelarozopizaf.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/nukawizaxusunera.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/08df9af9390caed2f73b4e5979f82a59/40905971032.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160863e1208ead---xoladirapukudirof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=snooker+wst+pro+series+2021PDF 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_off000200fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200FC 17408 bytes
SHA-256: f19c0a8fbd7cf4c905d5a927c1d254c7ff3faa17c2487171bc02b2bdad29a38f
font_01_sfnt_off00022d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D5B 10584 bytes
SHA-256: a70c511871ecf1962a628f4516e072963e8e46558d1c9e73f6f70cf2dd9f45f5
font_02_sfnt_off000245ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x245CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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