Malicious PDF — malware analysis report

Static analysis result for SHA-256 d697a7be54862fef…

MALICIOUS

PDF

77.8 KB Created: 2021-08-30 11:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c29b046e4f3141eb1f8eabd5c8e10985 SHA-1: 99d472906473dc5c6f7801fde370273d3f1e4953 SHA-256: d697a7be54862fefde348b493877e69bf7d0efffec58549b6be829373d9ac3bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ppntassone.it/dati/upload/file/winogajoritule.pdf In PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/9c431731ec63689bdf622f5224d39f94/jatuwuxowivamemasafut.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/maxetovewoku.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/15654437854.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/kuvulodazotogasidimose.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c412efc9e22---mofupamuvujipomexudokup.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210820073244.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/91040066927.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094ac552bac2---gijemupatikefakonorib.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/08a68c739bbb5e4b2ba4d68354f1021b/sosafa.pdfIn PDF document text
    • https://brtim.com/uploads/wysiwyg/files/vajexonan.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/3005549010.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf91120430d---2346684962.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210805062802.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/s8qs197qrgsenq2dpfc0es2r7l/48736922494.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/74868297573.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/c016e660113b8a8bd965e7cd84af6fe2/73078374336.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ko0bnol508g4re771cc9m20o2u/54450851528.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/40851588441.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/c2f400100a60743252f51b8c71529a8f/jigokikifipixubinomudi.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/68496919356.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/96277101553.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/f6fffeb23a2b5b7ca2b029f2f1c1437a/71701626091.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/20850380134.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7fdc628419440c2eb44d9a7ba9ef657a/wosamopotalitarotipamaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=appradio+unchained+rootless+cracked+apkPDF link annotation
    • 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_off0000ca0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0C 17684 bytes
SHA-256: e3a741b3b2c7336f48805932c7d77c6d8a080648294fe6ef745295a70ccb5b39
font_01_sfnt_off0000f84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 10784 bytes
SHA-256: 1e945cf9a99c5e3b1f9ff5916340c5671a2c7470845a8aae4568e83b2889f0d3