Malicious PDF — malware analysis report

Static analysis result for SHA-256 729d1e5b37c3d93f…

MALICIOUS

PDF

131.5 KB Created: 2021-06-25 22:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bb625afd2598954bdfd0bbf5a9f035ae SHA-1: 44ef731141dcc774c2c3ba5e79191a9a980fbc06 SHA-256: 729d1e5b37c3d93f88373c681a26d05bfaa58d1ad73a1a5d48cc5e56d9a49388
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9830

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://chcial.ru/uplcv?utm_term=single+phase+induction+motor+equivalent+circuit PDF link annotation
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/6c4tmm2vm56ovpnkbs1p8ngav1/23921240036.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/95160320641.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca201e321e---86721877405.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0af024be---zakewupofiw.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/xofotuk.pdfIn PDF document text
    • http://technocom.pl/editor/file/nizota.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d7f9280b3---nikiguwuremiwifuge.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e7ccd9477---62675339537.pdfIn PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/jakexitosoxepebusosazunis.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a66a57342e2---23059980052.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202106092159401627.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f678ce0e4f---21056791594.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1262852454---62185496194.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac13b56893---lejuru.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160ad825cb6f4e---pejese.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/1t0av6rckdkjod255j99ng6erb/kofetomufepekuzuzu.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/17857099739.pdfIn PDF document text
    • https://kopari.hu/files/file/31884162737.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/vosivekot.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc4cf968ae---18712753697.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a55c4e0dcaf---dopuzijixipe.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/82286505769.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adb471065bf---xilisolesuvuw.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000180f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180F6 11348 bytes
SHA-256: bac70ecd767cce6e212ae4d61ac3cc64239d1a720fbd1bf2a5298ca11a1d6aac
font_01_sfnt_off00019aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AEC 20624 bytes
SHA-256: 3f95bf03604d35b5e5af1c5a851e6834051276208c6a78780d8c91db752a0acf
font_02_sfnt_off0001d066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D066 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001e877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E877 16180 bytes
SHA-256: 488f32f6c7fd30bfdfe8985f543ad5a6747cc968f356b2ebbbb561db09c637af

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