Malicious PDF — malware analysis report

Static analysis result for SHA-256 0679e7cc02129053…

MALICIOUS

PDF

104.5 KB Created: 2021-06-27 00:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 089f3bb026e5d321be8b2cf7785ade05 SHA-1: b70dd55773886eb6a96eeb360909569980c33d26 SHA-256: 0679e7cc02129053ba2907f18fa3e311ec8f19dc739a3fdb2ac5a186c1c01213
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to potentially compromised websites, indicating a phishing or malware distribution attempt. The file's structure suggests it functions as a link farm, directing users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://sieompaysdebray.fr/lesiom/txt/imgadmin/file/37986210187.pdf In PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60484bd121---72693049861.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872613ea254---34411662298.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/mudofijilibisafidi.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33a74c462a---12546166162.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929c71e2435---21291776569.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/99a8b51d66df1774a27c11eb1b4d29d3/75691371665.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160d28a2ee3139---takefivizewijonovizisadus.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/55940293274.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/6khhmcejlib8l0adhjjkfjpp20/sifizaramatuvudil.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160abc59d51a2d---zaxobazavumuvede.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c20796d5f---62806340457.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33864d6b63---gotusubojazosemuzizaxewor.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/b0onnmthe0pbigkfl9n132huc3/vuberavokozeboserupex.pdfIn PDF document text
    • https://ibextrail.com/editor-images/2042654436.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/60817113410.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/1551781c7a450a841292602cd8ac1d27/32093157608.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/5faf91f853543ab8e59792cc9334a210/51829409860.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb11c978977---jejegokizeloravuf.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/68261548273.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/93987ef67793082e0a734bf2b1967338/jodozula.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/tukakozoruwedezukuriv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=center+of+mass+example+problems+with+solutionsPDF 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_off00012e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E12 19376 bytes
SHA-256: 60b7051d18f3132dff56526bc90f8f495f3994eb9f15a80d198236b9b706a6c4
font_01_sfnt_off00016116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16116 11084 bytes
SHA-256: d8e61bbe97f12b9d5d638eb5c576f9e6a0a6b9b6750c20702eab99c95583edca
font_02_sfnt_off00017a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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