Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb53a1fe4756b429…

MALICIOUS

PDF

78.7 KB Created: 2021-09-03 23:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d275756265ab6e367856550ab47ee1ec SHA-1: 96f009c2f9bdbd2e0de41015b1fa7dc214a49913 SHA-256: fb53a1fe4756b429a838c6f5c338cef9d1b12df3f717190609b9dd074ac49a26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://smidgel.ru/uplcv?utm_term=jeep+cherokee+2019+limited+manual PDF link annotation
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/22319350740.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de066cd8887---1566067238.pdfIn PDF document text
    • http://tarasovfabrika.ru/uploads/file/nejiwaluluvelete.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/45621950327.pdfIn PDF document text
    • http://csss77.com/clients/d/df/df7f2fdc42e243c7a03c192a8228c0be/File/81867418229.pdfIn PDF document text
    • http://abpaluso.com/upload/file/moluzapewubefopivi.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/9d2165e7535545d463b611c9703650f3/66951292728.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16111ed5a814fa---50413991523.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/latuwupobifosumonegemi.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mt0v1174pn6qosuork4m7858t1/79948681049.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/24913535226.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef402606e3---420972393.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb15845e89---83730599035.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/xesavodogirukulesitugopu.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/1q16ij5aoqdipnbkj6f05ese70/morikapozinalarobojisaba.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/287064827597ffed7700e3765737e2e3/wowade.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/junugak.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecb41edd16---wadegasudorezisiwaxodeba.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/82996963805.pdfIn PDF document text
    • http://iphysiology.ru/upload/juvizebamukaramogukaf.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/44586352973.pdfIn PDF document text
    • http://dsraxys.com/uploads/7899835019.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed9a634e90---86765429165.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/jometijijozexafolon.pdfIn PDF document text
    • http://veribase.com/E/file/64933049846.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/pifitedi.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/67678954120.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_off0000cd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD65 11256 bytes
SHA-256: 93ca92ae7131058f240782ad681a65dcabcf62b1bbb86b82a9e1ac045af31e28
font_01_sfnt_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 17404 bytes
SHA-256: 16b082636b55bf2dd2ec98f31bf7de822b3fe1e2e9e04bb01837aaf8011fb4ef
font_02_sfnt_off00011514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11514 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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