Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a42a0d74b97aa4…

MALICIOUS

PDF

92.5 KB Created: 2021-09-07 15:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b7c829bbd206288eea796f77396e0e58 SHA-1: 3ff3bfc51f249cccc32f4e55c31de97fcf25ae1c SHA-256: 68a42a0d74b97aa482f298aebe3f94f00fbd31bd651124cfbfdf424763714937
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The file contains numerous external URIs and links pointing to compromised websites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://pistant.ru/uplcv?utm_term=kitab+mufrodat+bahasa+arab+pdf PDF link annotation
    • http://totoumi.jp/upload/file/wujurodusesebekawovujebel.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d9bb26e42d11a29c1e21fdbcc036abde/dibinavofiririrakadub.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/wamixebuganife.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b619da193bd---51743343216.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/35c7e865a3dcb4205c36d36fe8fa20f4/5158234406.pdfIn PDF document text
    • https://ethnicacademy.com/userfiles/file/musapekaw.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/44564595752.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/d0911a2fb55ca419b4b52c0c30ebbc84/fuwevemerenojud.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/fc0db8e40d70c3f3fb2c975b12a7e258/nelosobowuzulevag.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/23425229987.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16102965645aab---68360059116.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/voruxapusatosilipuj.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/18140670502.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/12211563828.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c233ef83b29---demusuzadalepasirirojeb.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c684b7583b---guxodi.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af01416aae---74043922312.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/b4e26d576e37cd992705cbf3438eddc8/61228410896.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/19396203130.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/teriti.pdfIn PDF document text
    • https://noddy.nu/images/file/robakowobojovuwidefuk.pdfIn PDF document text
    • http://afro-safari.com/upload/files/nijuguvagixuwo.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1f3a4944c---86839265238.pdfIn PDF document text
    • http://balone.net/_upload/file///24669166531.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/xivomokemalegodaritarax.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_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 10712 bytes
SHA-256: e1119664e93c3f897636e142c9516121840e33db4c1421e6b7db87213ddab2a8
font_01_sfnt_off00010be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE9 25284 bytes
SHA-256: 603b0c7156bc0e45f9c4f76256f5eefb63e4fb9d3e115acb4b7b4d877931e7c5
font_02_sfnt_off00014bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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