Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e77eeef5c5a14cb…

MALICIOUS

PDF

90.2 KB Created: 2021-06-27 23:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ec94537debd279f6e0f48212f94cd30a SHA-1: f984d526bfa6ae6f1b8fe30316cabd95236cbc35 SHA-256: 7e77eeef5c5a14cb6196b64f27235c39dc199c073b97dbd5619387022178861b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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 https://pistant.ru/uplcv?utm_term=unsophisticated+meaning+in+english PDF link annotation
    • http://dhs1959reunion.com/clients/871764/File/tibitotuviji.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ofvfph197g7o6bhhbabb1v58r1/63874715816.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607578a0c3a54---55081553026.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/7359c40359230964872a77ecacef8e50/28294804756.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/b6014b89bf5d48f9016783e1b1fd39e2/bodidonukidudakav.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/6ec9e57d327098ef897c77cda5f45866/34458267875.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a902b0011a3---datavopijukadeginurilul.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a48106ec885---86670050135.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/50140319648.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/wetosutinelavekivudak.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/750246fdc5ec870d00d26d3626d99a04/pimaxosuwidikux.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/026b661d61c838e4163a68c2648648b4/70467545223.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e080a7d49a---pivobi.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/10lqjb6ogr7v5igrnapvk7ddk0/gegifobosetivekawanepeg.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/31ce8559e9660bdd43424f7d7456b212/89910384158.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079958192302---75432296490.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607148e57e71c---2143183369.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210523134551_1849812216.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/ml53ksvln18il01aphvkichs9i/wepagipa.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609432bd1e69c---webil.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/11pj7h43k08lq10q80la81ebrf/vinirili.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708f0ba0cbd---mapibifutafeloge.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/xumonubodoziledebopu.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/fezixufazotijakinugewoj.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/kulazedu.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/83387186603.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001222f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1222F 18604 bytes
SHA-256: 635cdfd5702e7bb4780f60ee23aef88717d838a9d27389d1f3ea31d3ac3fac19
font_00_sfnt_off0000d90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90D 18984 bytes
SHA-256: 3aeca811f72807e2b7e82c6968815f7ed979819d8262a33e9a42f29ddd875be6
font_01_sfnt_off00010a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14069 10868 bytes
SHA-256: 34074651801eea30558f39083bd7f8dd8ff94c5fd2200c045c6c7fd58108f0b2

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