Malicious PDF — malware analysis report

Static analysis result for SHA-256 8512ca5f1481daf4…

MALICIOUS

PDF

80.7 KB Created: 2021-09-18 01:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd891cb6938aff8a39052c6bae8e4b2a SHA-1: 5e9746f5e09835ecf6cdb7285974f317cef84a3e SHA-256: 8512ca5f1481daf4ba5e82b85eb20bf6251e928009ee975e085ff10574c79a9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The presence of these links suggests an attempt to lure users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://nomylo.ru/uplcv?utm_term=how+to+sync+audio+and+video+in+vlc+player+android PDF link annotation
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/wisinosipukavebizabofuxo.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/13558050965.pdfIn PDF document text
    • https://bor-diing.com/upload/files/32597765224.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613dec9ea3efb---52088383320.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8gc5fbppch2l1mv4f7pes8co35/40136580422.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161308b0f70ac4---6675372398.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/xituvurapevoz.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/neguxesow.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/rilejazixupewefoled.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/57193734510.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/vekagex.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/mutasebojazes.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133413531cc4---xodatatevegulab.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/83638436877.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/8247f6899259e9a5b2025746e40c55b7/32322352130.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/zovaz.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/logorewukupilef.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/nemuwu.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lavubobexojupoxurogi.pdfIn PDF document text
    • https://pcetravel.com/files/file/mowolulixif.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/21582315252.pdfIn PDF document text
    • http://pk.mo/userfiles/file/kelalomisiposinele.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/wogovemususate.pdfIn PDF document text
    • http://travelport.pl/userfiles/file/8751807653.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 10864 bytes
SHA-256: c47924fe4fd0621ea7d8dc496e647e82c67335c17b77155e247e9685d9318a6b
font_01_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 17044 bytes
SHA-256: 1975fc598ae302b46845708338b04ce0eac208c7d828ec56546a4f18fab7d2fe
font_02_sfnt_off00011cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.