Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cc808cf5f38059…

MALICIOUS

PDF

115.7 KB Created: 2021-06-27 17:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 52a4caeb5dc7abe50b5bfc4f012fdf68 SHA-1: e39740d29fc50f7b02f8873dc2b2f0e2aad0a42b SHA-256: 08cc808cf5f3805923dc9bf55535a06507e4f5616d5703c319037514690175de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely serving as a distribution point for further malicious payloads. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to obscure the true origin and destination of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4a7650f3b---jazelilelisakumixenobepi.pdf In PDF document text
    • https://tuvanthietke13-5.com/webroot/img/files/49579695544.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/67076482512.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/jilexelefividerolero.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/63763945478.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/av4jeescondmknd6664rd9qmj1/gavegirodipevavow.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094abcb448e5---xutenexumexolavefapur.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077e4b1cea6d---xabuzidiv.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce458a740c---jupine.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/lotasonafunoja.pdfIn PDF document text
    • https://foulardfotografando.it/file/56669563275.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd547807cc---furamuzifo.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/62490036649.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/c836635c65561f58d2eaa55490bf979d/rulanixugipaleketifurow.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/3168861349.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fe009d923---waferivufikinizofag.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/61362821471.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/raxulibotane.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/26fts9eg1v46bmdqrc6tavkaht/16444608432.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c140fc33987---22808053334.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/62p0od5ql5t09i8bloih8f064c/78541065490.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/790cb6534e4ebb0111aa170dcf16a7e4/fufubaros.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/5dc102ca3f97b0e4a0fb14ad430fe2cd/sekeganadasuvap.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606f11b5eb260---75195857115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=limit+as+x+approaches+infinityPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e1d988585117b492f9831670dc84cb8e/sewajonab.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA5 10872 bytes
SHA-256: 6a32e30fcded656133e0fe2c80aee5d6636dc421e0e6960acf834590552ec9e1
font_01_sfnt_off000173a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BB7 19732 bytes
SHA-256: 3db665678cd3f299c4289158cfd574d32783c0db75298e72ef55ec9c7fb19eb3

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