Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ee4a07956166cd…

MALICIOUS

PDF

85.3 KB Created: 2021-07-08 05:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7ead603897821b57cb604b0a7f5393f9 SHA-1: 73d6a792d9eeae10acc296d351642b373ae02753 SHA-256: 65ee4a07956166cd20fc6233150d17a69a0c3555dcd723f81fe7ea157734c1ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, many of which appear to be WordPress installations used for hosting malicious PDFs. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://wastran.ru/uplcv?utm_term=easy+sports+trivia+questions+and+answers PDF link annotation
    • http://chinamakina.com/userfiles/file/96183651589.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d408c8362c7---1481211354.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/84057e42faaaf0a1797d318103923968/86283753265.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/xufam.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/96751536885.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b7509a3d---xiperitixojik.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/4bd0097cc1c38263419692953c828871/kavabimojewuf.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c30cd2ba11---kikewanaragaladevikikupe.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/72241182844.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8af0a5032---79305890304.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/gewode.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/vjjmp0sptk4cm16fapoghlksj7/vumivakijarerip.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/gemunaxogoxuvi.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/59062960116.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/zibirozuperipo.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/73269588063.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/vamozobizofaruberukonuwax.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b69943c67---xobazezafidupuridedup.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160775cdcb0849---kuvukakajezurapone.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/9ph0it8g0fqba6b34m7js8sn7n/95134781120.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/61677372743.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/66101777629.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/29g72eul270sh9hb8fhccnf4dh/kapobarupibosuvu.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/56386849945.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/91470148148.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/bijajigukifazo.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_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 17700 bytes
SHA-256: cfd3c8c304c74686f886310f9e831d6e9c1f84afa0bc68e02341d2f341dd1d7d
font_01_sfnt_off000116b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B3 10836 bytes
SHA-256: 989c34d50055f3054107914a3f566825d74fcb0db60e6cf1a346179e6356c483
font_02_sfnt_off00012fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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