Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6a63649a82feba…

MALICIOUS

PDF

80.6 KB Created: 2021-09-19 13:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1717116c992549552159651ea403cef6 SHA-1: b1cfe2e69ab2748526ead6fade1e421d80770c48 SHA-256: 0d6a63649a82febadacc4072bdd30ab3f524a4e0e8452c371e049580918b4f74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, suggesting the document is designed to funnel users to potentially harmful content.

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://smidgel.ru/uplcv?utm_term=the+bro+code+barney+stinson+pdf PDF link annotation
    • http://sanga.asia/userData/board/file/towusamobupewugige.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021091313173673499.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/89300976250.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/57037467285.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/62391102366.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/14986897872.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/laxumukis.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/berolopamoxowire.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/21024746111.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/55405776621.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133757d97205---daregivevina.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/laxorarudewi.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/4761137679.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/a84dadeeb8adabbff241d080c8fe1e7b/41560162248.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/zovatixe.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/bumenunawexekunugonegobav.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/77668327070.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/81502707799.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/sasixufelafenewil.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/mejebolukokikivanop.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/10472262107.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/20400224391.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/xazozenamovetemipeses.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16134723fddd15---lokisogegugujesep.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/68345820841.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C4 18492 bytes
SHA-256: 282489559a65a1afaee6c5689888ba61d21ee418f3da2ae9de516384b72b702a
font_01_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 10888 bytes
SHA-256: 1293465c922a17191d203a059628e9e495d52c1030fe0dd10b19e18031f676c0

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