Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de64547565d9764…

MALICIOUS

PDF

86.8 KB Created: 2021-06-28 00:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: da25648a6e2bf26f6a27263d846e68e9 SHA-1: 5be200569f5b6fc95bd045d1ad3656e2a7194ab0 SHA-256: 3de64547565d9764a00be2e7106b9f7c18f4a1b25f2a4374081aa6e0fa920e74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ClamAV and an ML classifier, with high confidence. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/e362dab6aef403f70adaf65092172d78/wuzipuxefevimuw.pdf In PDF document text
    • http://nadiadsa.org/userfiles/file/jovidokidatepugezoja.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/20957601731.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ih1tiipric8r5jatgf5r4qaa48/lajuvebadariwesa.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/kojafekava.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/85179229476.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/75484140737.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/fomepunorunikeraforikelu.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/legilolinuf.pdfIn PDF document text
    • https://lesura.net/userfiles/file/83156491657.pdfIn PDF document text
    • http://szpk.hu/_user/file/43336335964.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/navujotupukesawez.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/hg0fim84t497mjbuaetq3f9mer/90358560646.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/masururanetijavifemonizew.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/57597255558.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2720bbe3b9---xotojuwasivowixipun.pdfIn PDF document text
    • https://memoservicesrl.it/file/puxegejamunudu.pdfIn PDF document text
    • http://vce34.ru/attachments/file/fanudot.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/38053093112.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/eqaf8bgvo8u33nra2vobbgr0t3/89001903946.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/piripoparodabadi.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/211a2a7fa5999bbf982ceeab67058677/felirimizebegekuxedobe.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/r8mikr15b3s8k1rfpilrtr9087/jowadoborezetadam.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/ae1e9b04ee30f9e814981fa5f8715604/55030750961.pdfIn PDF document text
    • http://adveotec.com/img/file/fokevurejulikutoz.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/fozetufimakobiledav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=country+music+playlistPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C1 10648 bytes
SHA-256: 423345a5f1832106870cc98ab0c19399d2ffca8edbcd7cad6be36d01815a9ad1
font_02_sfnt_off00011e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E33 17956 bytes
SHA-256: 297e4772a1d7c0b9bfc30827b2972fd82c2c9d7e2ae3318ce503393931b71803

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