Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e29701b908272b4…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 16:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 02e2792c95040fa273d4f2b75c1025b6 SHA-1: 1d80e38834a8cb4697516e85553faec4a0d9c35d SHA-256: 0e29701b908272b42061eeae22e8a5f08f1b16500852d0a126bb1f0b4eb70309
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised CMS uploads and disposable hosting. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users to potentially harmful sites. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://kinel-hunter.ru/upfiles/file/lugazarugekafu.pdf In PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/dazuvebesedubunivi.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/96729409991.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160778f86a1e2e---raxujonadavupexurap.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/figozosibevarojuxijikotos.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5c253ba7985516ec9987f62aa76ce2d1/joraxagesobelebe.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/797736611.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/p4jjbho6kajc7egsqd7ugho1bu/60176688965.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/uumoqkrs1fpcdgq0jvl6ve0jui/zeraxeluxanogulumowifite.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/14236687492.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/6475020557.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/motipiw.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/42485713287.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/71491929591.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/tumiteladagapolejovej.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7253cni1qmjfn71f2mh8no62g6/79152664717.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/68c4f249c3810c0615fea68d96d97c06/tojodesagiwefepiwi.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/25304713629.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/sajifejadit.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b92d44b3a3---21625086621.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/nojasever.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/selemadomisut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=kalender+november+2018+pdf+druckenPDF 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_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 11316 bytes
SHA-256: 118962c403a9582c27595b38d7e43d82399d0a44d482d65ba27033621bec7c9d
font_01_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 20156 bytes
SHA-256: 1dd676cf4fc48e6bba567a9f3538b961db2c30788e6dee87e95221050793bc99
font_02_sfnt_off00012b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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