Malicious PDF — malware analysis report

Static analysis result for SHA-256 d921ccc404e94b3f…

MALICIOUS

PDF

80.1 KB Created: 2021-09-02 08:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 14a16df85f1c1695372932a49e047a19 SHA-1: c8cda984978e5a9ee898fb3e8fb9085f5a8cd9ce SHA-256: d921ccc404e94b3fffd85ab93fa2711bcbfe3f9c2e8edfc2949b441c0e882bfc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://laborke.ru/uplcv?utm_term=how+to+draw+male+anime+characters+step+by+step PDF link annotation
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d53795ca408---43975758355.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/supidezewo.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/5245172008.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ab644c4e6---62891873243.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/71826984976.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/10fd466cb3ef5330b9e4b60b834dd76c/xuferatenaseva.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/23463491299.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f42dd4189c938952be42a36e8327a5ff/tipopudavazo.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/48355879294.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/zufelakadejenifimukoz.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/funekibafavujawow.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/24636c414b914b4c8f4ecdf122a4086f/sasegebafako.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/80143236164.pdfIn PDF document text
    • https://banghenails.com/upload/file/wufesinerixexijavak.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/bezugotok.pdfIn PDF document text
    • http://shopabrang.com/images/files/23931694217.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b361673f3---tudupigobirom.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/65186169719.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/kafujosazu.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/80650322173.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///zikapanunujitenelito.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/h7e0dl7sums3il93a9869k0np6/52848476584.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D6 17712 bytes
SHA-256: 5145ebdedfc62d10a212fc64bdbbdfde5986e73fba30f7c31fbf2e5e8ae98219
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001185d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185D 11112 bytes
SHA-256: be4272052177e0f11ecbd5c90390d4c68c5a80c0a944e55b06d5e7ead6f0e4f2

Open this report in the interactive analyzer, or submit your own file for analysis.