Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e96d7024812b0f…

MALICIOUS

PDF

86.9 KB Created: 2021-07-16 00:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5df68c2df4564e8b32b504522af46351 SHA-1: 3fa08198b072757b39663886a4e238d3638d8d62 SHA-256: 68e96d7024812b0f759cac7ffd37a94643ea03c0c38a388b35ab177be2e8afd8
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://moto-bike.pl/userfiles/file/basirulopuzumun.pdf In PDF document text
    • http://simonhoirup.dk/userfiles/file/91371256799.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8adb3e08a---kobodakatutekivunusowif.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/f27a4855a8b59afd354b434578c34379/waviloxipitugi.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d58d6381f6---94142663307.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/94310978541.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075937521e58---30350413766.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160960f847d043---25084577506.pdfIn PDF document text
    • http://guiaterrassa.com/fckeditor/editor/filemanager/connectors/phpfile/42989432761.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/35902709821.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/329bdc6d5547ff3322d830cdb91d3559/lulelunirazapexur.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/xesixipedixelewele.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab573e957be---23538396927.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/34f185551ce1ffb862f16bca9f6bdefc/pulovidinunalas.pdfIn PDF document text
    • http://internationalnetworksolutions.net/files/In PDF document text
    • http://septumdent.com/img/userfiles/files/79782614177.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607b786186f22---87547193878.pdfIn PDF document text
    • https://ferropula.hr/files/66380274278.pdfIn PDF document text
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/14225707187.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/edg1nu1kh9tb095jqibrsk04c9/tifaxabegudenuxexul.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/2kqtv21cs5devbpfrfmi5q43c3/47963292955.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/aj4627tgc9t41vqa3igsduomq5/fuxexepirakanibavomalu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/tobolulofadodelu.pdfIn PDF document text
    • http://araonline.hu/uploads/file/kitabodiguwakewaga.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/pubuvapiputaz.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/rukakiviribuze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=class+6+english+honeysuckle+chapter+9+question+answerPDF 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_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 17012 bytes
SHA-256: d8eea5b58105632f18b4c88cf837732d341f338ae09f00b4fa8743ce13f6329e
font_01_sfnt_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13105 11556 bytes
SHA-256: f1de04ff310c87909153d30ac8ceceafb04cdc93d81aabf0cea78ce3721bf653