Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3eeae838b6e8dc0…

MALICIOUS

PDF

107.1 KB Created: 2021-06-27 02:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ada1043a51bf561f26d7dcdd59b8068 SHA-1: bb5abe5e4c0c87a02a8e110f367f925f03598b77 SHA-256: d3eeae838b6e8dc01ad43e7cdd1a5fb3f577eaab349e62f70a7bdb14e8fe0474
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature. The sample likely serves as a lure to deliver further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9570

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://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bead4868ad5---judobuwefikabojutonogasi.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/515025c0ba1e2fc769d177d3f293ac19/80769433634.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/kggcqua7ao5h7ekpdpodq5v00h/jasetewepajoparapedonib.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ccda41ddb---folobudefoxowo.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/7fd01b8317309b25875dc08711bcc3b2/vilarurubi.pdf
    • https://bursac.net/userfiles/file/maranomugiked.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/6870a47dc676713c4c0bc31612e667c0/2608883808.pdf
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/tisebupegapabowigeboxeluw.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4adba7a5e---zunirazuwuzoxi.pdf
    • https://signika.pl/Upload/file/rumefavodagonojaxawak.pdf
    • http://bet-balance.com/userfiles/file/70835749971.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608163706c815---raruxasilawelafa.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/13f85e13e5d14c3d2384bfc5fb8f0ba0/dufufixuro.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bc88b04ec---rawijilino.pdf
    • https://syntellect.ru/Repository/file/84087430448.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607517f6da9a9---tugirali.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/b906f9d1bf2009f5e37201593103829a/93912646702.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607685284ea0c---bisomituzebalopenolakofub.pdf
    • https://cissud.eu/uploads/ck_editor/files/womimak.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ca01812ff87---posogazerapali.pdf
    • http://aarogyamedico.com/userfiles/file/pebavuwanatixiduniwuxi.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4415ad9000---41330688581.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ae65dff9---fomewi.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160850297ae359---rofefunuterig.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/e9g378qkh0ml4uk3vr6ahumv5h/lofesalabuzovurotibaf.pdf
    • https://louvre.lv/res/wysiwyg/file/35499858591.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+wing+kitchen
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140e2.bin
c2d76cc4f99af528ffe67da3e664455314b903f1f2f59a9c22e7dd3de1bd8b69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140E2 18420 bytes
font_01_sfnt_off00017099.bin
839187762734ec0ca7aeeb37c6680d01e8b2857bd8e4dedb72769d6a851cef52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17099 10056 bytes
font_02_sfnt_off000186fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x186FB 16792 bytes

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