Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02ec12c535ff63b…

MALICIOUS

PDF

83.1 KB Created: 2021-09-14 10:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9a8ea815db25f8566c74fac2dfd046e6 SHA-1: 17676a10c43ab797216c460fceac55cbb742c74d SHA-256: c02ec12c535ff63b8f5f587f9b443ae04d36da263dfdccca3b91c3ce63ca6476
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many hosted on disposable domains or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jamisonfurnace.ca/userfiles/files/divalemawaxopepafozuk.pdf In PDF document text
    • https://mlspoland.co/files/file/58763097528.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210901095549.pdfIn PDF document text
    • http://radio-clipa.ro/userfiles/file/joruzufeletam.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/dujamumaxosokulib.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/de9tjuulbe0f0v8cb7jp05g2m3/pedekokipisarewoni.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/24733198973.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136172ec4c1b---6056603510.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/lotofixidewuxusij.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/95933451344.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/gemumofiviketuzebuwane.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/80604018983.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/19011070749.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/70320098356.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/sulibojukiwejadejuv.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/linuxekumodonigu.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/84743545975.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/5ce791bbcd2ed7ce4f6a7f717135dfdb/wimexuximonurunozapavat.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/45566046623.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210902105142.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/33168368720.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/60270572920.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/44787825969.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/juvuwureliloloxev.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161345baf3267f---jowarototisapefoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=pubg+apk+for+mobilePDF 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_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 10664 bytes
SHA-256: 6678d64ced76a96dcbb4723add08a4b3dbd14521ff7ff2367cd3cb41fe0889f9
font_01_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 18348 bytes
SHA-256: 18af8bb08d78d7863fe5e5293bba693fffe8b1e9b62762b475fc26926858d596
font_02_sfnt_off000126c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1