Malicious PDF — malware analysis report

Static analysis result for SHA-256 149dced2fd64130f…

MALICIOUS

PDF

75.0 KB Created: 2021-10-06 21:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 015a0345a3ffc86932996e5ebe8049f8 SHA-1: cdfae2953d0f4c851da9cd6e9a450492ace3f911 SHA-256: 149dced2fd64130fb0cd7e140c758d7643a975358f277e6f3f318b0587f8b45a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The presence of a 'utm_term' parameter in one URL suggests a phishing or tracking lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://irlanc.ru/uplcv?utm_term=png+to+ascii+art PDF link annotation
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/mcg61jaghgc3kmf449cur2mm4v/55927683088.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/66480332148.pdfIn PDF document text
    • http://birdwatching.sk/media/file/20179340987.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/15017610877.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/47791433398.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16158eaa17bf95---kurapojesisuxavodamikezi.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/vepifupizunusaj.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/zuxogowavavexuzopirafoz.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/88483613000.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/82920407361.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/61093790088.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/gijajazate.pdfIn PDF document text
    • http://gestioniarmatoriali.it/bajetuxojenobopejig.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/15979528497.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/84954372774.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/23a78bc14471f0fe011347157ae652d9/xixobotajogaxamepalun.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/20128259521.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/nopit.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/sokelaraxuzelojo.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/6ui1epotec4qoq4f1f2ipl7bv6/sasipurebejodetoji.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/17730887597.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/vijabupagepuwixufiro.pdfIn PDF document text
    • https://pkmoscow.ru/ckfinder/userfiles/files/warexijobolumo.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/jerot.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/vavejopiguvobeto.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_off0000be8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8F 10228 bytes
SHA-256: b8ee73eb77720111df2908de3217feb93ce8fe0fd0ec29ed3106cf42009d56d5
font_01_sfnt_off0000d5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A9 18264 bytes
SHA-256: a0a4ab85e274201381f69b4a380727e84b724db89b8d576dbe356c90de841f62
font_02_sfnt_off00010603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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