Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ef9b3cb643eb56…

MALICIOUS

PDF

90.1 KB Created: 2021-06-27 14:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2e8ff92e92a57b948c1bd7a58745c7b3 SHA-1: 565cb9bee6eabe51f36816560d257d442a1c1fdb SHA-256: 62ef9b3cb643eb56de8fbdb9d655d7ad96c641b9f28306af63d762e8aeb5ba3c
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The document's structure and embedded links indicate it's designed to lure users to external sites, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/b13793028911b6984c9822c42415c544/lapasomufojidove.pdf In PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072564c290af---92076693361.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/86724743275.pdfIn PDF document text
    • https://ptogel2.com/contents//files/jupofogekagulimivogo.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/76693736313.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/37327725859.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/dafebuvakinanalisakavil.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/51b502bc23c9fa1bc046bb0dce96cdd6/zizazunesubuzarokabapero.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/repotuleb.pdfIn PDF document text
    • http://vangphugia.com/userfiles/file/fifade.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/78971467604.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/7ira3duo91ps34sd4hq5n056vr/87938943037.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/ecc72aeecf6385f4c0b67191158c380c/53714768000.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2c781207f---84310285864.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/fuzurekabafetilabutave.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077e51b01be0---dokifagepir.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/samejo.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/99511416480.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/54432370856.pdfIn PDF document text
    • https://2acontractor.it/images/file/42745018844.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/181363409cd9ef0d57aea8912431426f/2432400553.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd14e36b39---dukilukume.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/3501570aef6439653cd4a6f553d10393/titegotiroditavofezapi.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2d12ae237---9135414291.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/dakovinizexuva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=i+am+poem+examples+with+metaphorsPDF 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_off0000fd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11536 10552 bytes
SHA-256: 45915367717d83b4979a80cc653810cf5d1929512f9b873b6b98751816ea6f07
font_02_sfnt_off00012d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5D 17480 bytes
SHA-256: 814144483338a94c81a928d370be20b5bcf38c0863904161e11244efded066ca

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