Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bda8fac0640f40…

MALICIOUS

PDF

73.9 KB Created: 2021-09-06 12:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d4fc339299999b059cbbae965ce61e77 SHA-1: 2f0936e4aa4f002b3a928d4d1b679f4be6a163f6 SHA-256: 96bda8fac0640f4015a3b3b717702025b629844e6b3b091ca01f2e8279951a8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content, likely as part of a spearphishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=nut+tightening+torque+chart+pdf PDF link annotation
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d66f18862828c686d05009797751c3c7/pixakatazimisulevumifubo.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/af3a6eed5492aa41f0059ac5e270307c/68214644556.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/moxavuteduw.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/25afea1715aef4613bf750f1ac04ae18/ratapugapaderusojifuwu.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/87760983502.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/buvapewo.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/wokomugalopaxifokow.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/77216086401.pdfIn PDF document text
    • http://medipharmacompany.com/userfiles/files/9417732066.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c981c37f14b---47527642306.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/18924341976.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/45p75ftghaafjhbav754ahi1l7/ledufod.pdfIn PDF document text
    • http://utopbrake.com/uploadfile/files/61927475307.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/waraloreweg.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/dajobuxotufodivisa.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/tapulilavipijowur.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/939b83da9590ee2ab4a521463928893c/61274745923.pdfIn PDF document text
    • http://ave-france.com/pics/files/46506188520.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a9a74e5e5---kabalo.pdfIn PDF document text
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/dazovapisadiwele.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82615f676---80971363739.pdfIn PDF document text
    • https://labelmarket.pl/data/file/87987185495.pdfIn PDF document text
    • https://menu2uplus.com/images/file/29193493545.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_off0000bbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD404 10908 bytes
SHA-256: aee3f0b1687e7f17fd7e69497a999a7293793d0b411e4fc445588f7de7b985d7
font_02_sfnt_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 17552 bytes
SHA-256: 704d78df43c9fdccf19723458b242b8abfb6b44682c990f5375dc96337e50706

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