Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e6f0f014f5a9b9…

MALICIOUS

PDF

73.9 KB Created: 2021-09-18 12:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7048248eae6662a542004c638a4ced0b SHA-1: 3c898c5fea59f92229e121b5666c81ab864fa525 SHA-256: 07e6f0f014f5a9b9fa027ba5e46a91639b6c2378cd8b641fa4956382137e30c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=android+12+launcher+apk PDF link annotation
    • https://hilanguage-com-tw.triangle-design.com/files/bubomap.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/xajegomapafudesen.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/digamajo.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452940ca53e---89125075955.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/janut.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///fatopimusimome.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/030322302165.pdfIn PDF document text
    • http://www.ap-arte.ro/fckupload/file/xokumuguxukabugit.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/72073742843.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613888064ae79---dibovurosajune.pdfIn PDF document text
    • http://108shiva.com/userfiles/file/In PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/zejomijiwivizanoki.pdfIn PDF document text
    • https://linardi.ru/files/file/14976882643.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a4b281a0a---4879708134.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/nurudukosif.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/kefaxesin.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/5117446053.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe32480d0c---55881519200.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/xijukugawoperavefapoda.pdfIn PDF document text
    • https://lecachet.fr/docs/files/63697340235.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_off0000bca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 10692 bytes
SHA-256: dbea5ca9d66858159ec15092c71df5ac1efd1ce0f69bef6e75a1d19d5be2c920
font_02_sfnt_off0000ed35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED35 17460 bytes
SHA-256: d26d9bdad991e38f16bab71709208f5a2f570927dd64b687561da1c837f98736