Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f36c30057a03a4…

MALICIOUS

PDF

78.7 KB Created: 2021-09-02 19:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d7384b362f36b70b6415680cc3aba50d SHA-1: 8becbed956fabbbd815ea5605b64552270437862 SHA-256: 22f36c30057a03a4fe1d5e0b7d26f1bccf5bc49593fdabde646537055f73e397
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of external links and the overall detection profile indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://stillwaterponies83.com/clients/74660/File/zawife.pdf In PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/fc60f5e008e235a55d324c3300c40577/8286406700.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ca45lg3n7q064pot4g80d6h0lh/lajot.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/zuzupibelil.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/jexuzerenugezogupebik.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3820420f086e0a1aa9e039a4f7adf3de/denokanabinunuwigi.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/koruvusado.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/0pkvn2m94uomvjr89f14pkid56/vigelavejukemuposuza.pdfIn PDF document text
    • https://ethnicacademy.com/userfiles/file/38171916859.pdfIn PDF document text
    • http://pasarantogel.com/contents//files/lisifurukalis.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/lugijapozofulivife.pdfIn PDF document text
    • http://didula.com/img/file/dalibowakovozumol.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60E5170503803.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/cf0bcb3d0bcf81597a8ac8c0a35f68b8/6207000191.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/95060314147.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160804af68e0f4---mitijirinisak.pdfIn PDF document text
    • http://elm3rad.com/file/zofotumuj.pdfIn PDF document text
    • http://snft.ro/media/file/11814743300.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/telatiwibuvut.pdfIn PDF document text
    • http://goldmustang.ru/files/files/jeligawudukaxipotedobidi.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/napedobosopabekubabeji.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/161030bac2cfe3---74947919613.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4275053b7---romuxubinavisojunuzum.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/65e29f21d8793893152ea521e316eac0/sulawibiwilufavabatuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=culegere+matematica+clasa+a+8+a+paralela+45+consolidare+pdfPDF 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_off0000cbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 11516 bytes
SHA-256: 170a626e7001abc934d7c2181ed0730b6e6de625f57640bfd65b920e9100884c
font_02_sfnt_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 17760 bytes
SHA-256: 6d6880b177b11d98285578855a9bca489d3c5aef0348e46a930b7893cf1a5c14

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