Malicious PDF — malware analysis report

Static analysis result for SHA-256 092616ca946beeaa…

MALICIOUS

PDF

94.9 KB Created: 2021-08-20 15:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a1d23c9cb17119027bf10bbd31f33350 SHA-1: fd3cfdeaf76e38bd69e11ffef556b6799dd6ee24 SHA-256: 092616ca946beeaa4014ea93c88dc572fe693ab1f9af8e527bc149ac77d54533
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting domains. The presence of numerous links to PDF files on these domains suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://ketex.com/trcgp/ckfinder/userfiles/files/deferanurinewufonuxa.pdf In PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/zixebevesele.pdfIn PDF document text
    • https://luminex.pl/upload/file/domajoganexepebiwupa.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084235ab088d---folokumajabigok.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/dexiranozipubujedumadi.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a477b525810---wosuz.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/jajiwopegaruzibosig.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/68339546342.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/jozizaf.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608092c51b048---fovojuzuz.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/jiwitojubapazubotanil.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/e503ffe3df0bc651d9ccdbea70c184a8/wilitejividasaxurelul.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/48477483599.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-8-5/20210805022902548741.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/e7dh7vk3pid34p7gc52dj5v48v/xomudututolebidofuwa.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/8mba4occ95sci2d90pqh6u4s7l/69106074767.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/22797465831.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/906e16a61633566ba327422677e745f8/wisojisividifugibof.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/8abqf0mg9rtshsuqoej0h94nq9/wupirusubosogopavu.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a78d8a5d53---70238415254.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/81b8f84b47b71519f1a8128cfdd26fe0/rabazifepuse.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jibolirezevuzabexewotike.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16079b15ca74bb---metasataxizadaputar.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/1b0d268ef4d6acb632857e8f19c9357c/verukafedobonadik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=is+it+love+drogo+season+2+walkthroughPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4E 16936 bytes
SHA-256: 4f0d05b6918fdb1c22c7ec4d9a463707fbed46328dbc9fa65ce2a79e7593298a
font_02_sfnt_off000123f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F5 10944 bytes
SHA-256: a140c2a777306c4041f9d909b548322abc7337506b0b23bb7c48d003e7371142
font_03_sfnt_off00013d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2B 18320 bytes
SHA-256: d36445585500fa4bb4c70b07b8d3ac3e0f912bb619d81f5d171ef675a1498ba6

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