Malicious PDF — malware analysis report

Static analysis result for SHA-256 695c1c5fa0723649…

MALICIOUS

PDF

82.9 KB Created: 2021-06-26 17:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59ea46b3da14eab11fe41b0b5bd4945e SHA-1: 4841459e75591d9ee7fb9861273aa6eff9250e2b SHA-256: 695c1c5fa072364965a29740ed02646c8ca420b56e6de0c4898ed144f9ff8070
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://imailbox.nl/images/uploadedimages/file/gaverorozawepilepif.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083b8a5ac2f3---bisiwojuboku.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b113bfdc6---batezuse.pdf
    • http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/dutexasewis.pdf
    • http://al-bandak.com/userfiles/file/45502076546.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/taooplts7td9l81lesm1djqsek/gatitiruf.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/r8b6t0ln45emcbb6rc8uf29gk2/sobufugorez.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jun9a1kcnpc815nfjoh4563dj0/xenumavaxenebawijibor.pdf
    • http://kopdesign.nl/userfiles/file/28376647040.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/8e89443fa768e2bf573f01a7b21adcea/40090676032.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8406ab3b9---togutipan.pdf
    • http://nedirajtebosnu.net/userfiles/file/wilafusopolopaz.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a7447720e---tiloduwodakazisat.pdf
    • https://kodcomputers.ro/2664/uploads/37061559563.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c7fb0dbe479c7a99128e62021399c1e2/tokatobenadegaxojuxikenak.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/94e90a3f2e85cdc794b70b227bc1745e/nexoligus.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a8614f10474---5279539118.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/85d0mbop02gs1t90tchgg0q2hb/tefanitewut.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/p6vbvgkqate6h1pg873i95ucq1/99430011350.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1b1a6b4a6476fa73d95197e7292fef88/72403606937.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/d1956f177139f4ac83d1c73780a42a7f/28650590976.pdf
    • http://brixtontaxi.com/survey/userfiles/files/rageligotabe.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/183349dbe150ccaed7fb630514e1e6de/72858433815.pdf
    • http://saltokisport.com/uploads/files/dowisulamakodix.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc53a2359f---8107862172.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=grade+2+test+papers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e309.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 16792 bytes
font_01_sfnt_off0000fb20.bin
ce5e6218f972bc63e15087852b298b4b57c661405c0a6bf5865a4c0c4c9fadea
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 10180 bytes
font_02_sfnt_off0001121f.bin
29cf59ee1f4389b251e076d2b2c6a7f7224ed8100179633a7cb163f9c0d90a4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1121F 17096 bytes