Malicious PDF — malware analysis report

Static analysis result for SHA-256 150694f08c32752c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-08 02:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ca1ef84a1785c981c43fe36ff4119564 SHA-1: a3349295a41fb61a59e862211df2425fdd31438d SHA-256: 150694f08c32752c30fd7fd7b1437033d5f3777cdab3ca8f6317192d14f6ded5
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 high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it may leverage embedded JavaScript or exploit vulnerabilities to redirect users, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://vititanon.com/user_img/files/90049181593.pdf In PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/muvobakimuzivifekuxep.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/79364347321.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e3e9ce71a---roxumomixekivimusux.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/sarelolakiwojoxenib.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b43bd7d58c---41842960846.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/tovozob.pdfIn PDF document text
    • https://topaldanang.vn/uploads/image/files/zotitus.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/8944507567.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/c55c210481c93e5fc71f9b6523004502/94438320768.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098bdbd31126---xarozojiburamovegepo.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/rolf98dkj574dkidaifbc6qh51/46364050157.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/4fusj7mt3o2f7qrtur6q7v0e8l/94573789618.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/4ec451f2387e896974177b0c5ce1eb0d/96370399687.pdfIn PDF document text
    • http://strandedtattoo.net/file/piwenedeporixelojuwu.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/guwasisinuroxebo.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9a93c00cf3---jivemisovafolurujiwewu.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/patojimojin.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/t9thu5jjl3h3dr7ih6pgj9ifa9/nogarozumomoxapiva.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/98792123410.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f353cc9147513828214d3b60557b231c/lobes.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a0bf8cab8---totosojirika.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/81872771096.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31a2b7474b---99919480505.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/modutexodexil.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/qbqpfhkenc32ceaktpm1781tfd/73147181177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=jeep+grand+cherokee+laredo+2014+manualPDF 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_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 11156 bytes
SHA-256: 9411b377bd4aee09d909d40d3aeef07cbc514dc69c381fe16f81f05b7c167060
font_01_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 17632 bytes
SHA-256: aa6c4d0b648fc98240575665312c0c5d21c10e0564686818fe8361dea4071d77
font_02_sfnt_off00011fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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