Malicious PDF — malware analysis report

Static analysis result for SHA-256 097160d1fb3f4b4a…

MALICIOUS

PDF

68.7 KB Created: 2021-09-03 21:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 512728b1e05f99454d716d07e157b663 SHA-1: 309e91f17f9d8b1799f47153f9e165002f40509e SHA-256: 097160d1fb3f4b4a70d92604ad17e63b29207e977da84ca1f2d5cdc626dc4864
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-based interface with multiple clickable links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely intent to trick users into visiting external sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://queure.ru/uplcv?utm_term=spanish+present+subjunctive+practice+worksheets PDF link annotation
    • http://meyergarden.com/ckfinder/userfiles/files/13732282691.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/18521738435.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e2ae39edf---22953474771.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9388c10650---24599690406.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/96437119632.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/digumava.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/rowasesudabuwivusavi.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/5oj1rsmf8kq84lkgc6n83qlmea/129454398.pdfIn PDF document text
    • http://simpelms.nl/userfiles//files/56617549719.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/mawelusakoduvej.pdfIn PDF document text
    • https://jotelek.hu/files/file/64471061910.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6ba417586---gafetabudigi.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210825082759068.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/e954b52a68c4ba1e5caed1f825288857/11285326418.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/53418363426.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/70898494378.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/17806177519.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210622_152410.pdfIn PDF document text
    • http://grimastone.ru/files/felineros.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/wukoxedaxabegow.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/68048325608.pdfIn PDF document text
    • https://cape-electronics.com/media/file/89285033262.pdfIn PDF document text
    • https://ckmandarin.com/uploads/70102067130.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/8kimjqr4c7435jksijhiu2cet5/bakerigerap.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_off0000af53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF53 11116 bytes
SHA-256: 629c38e8a030e67a97ecb5ea380544ec44ef993589f595f2a4a9609b08be3873
font_01_sfnt_off0000c90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90A 13796 bytes
SHA-256: 82dc8dc89cfcddd56deee1ba51807028d8ebffa71c8ba41f7d9791973e405eb2
font_02_sfnt_off0000eb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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