Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e485cb777e49030…

MALICIOUS

PDF

92.6 KB Created: 2021-06-30 00:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 37df4ad99fd80cd962a348b459210eb5 SHA-1: 8c9f7d05a8923545e199ccfe9c4a5b3bf12a0729 SHA-256: 9e485cb777e49030cd40e2053b6c88cc6f0644ba83f050a083aa9010c3ab1ffb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an exploit or phishing lure, likely leveraging embedded JavaScript or other PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://beastyenergy.com/userfiles/file/kexeno.pdf In PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b24be33cfe6---94520962467.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/f8p0s9g35vv7ii1kf71ip8c6kl/68283073104.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/81fbb80d9e75398bb9ed1fe4f34bade3/veretoli.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/xanarolixujemimumi.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609082bfd3d73---wuwetinoxagesizowobuz.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160798a67e1b00---65417673767.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210616015310.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc06fa33a9---67093402953.pdfIn PDF document text
    • http://asustainable.com/global/file/27890562008.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160791be413621---panenikaminatinedalote.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/voxamezidil.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/tiwaruxixukemetun.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-29/20210429232843400920.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d94f25cfc6---bogimamu.pdfIn PDF document text
    • http://fedime.org/imagenes/91241609259.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/c694d5ea160eb8340a1936f6c4dc3207/65909369803.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/32220992307.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/87935492195.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/80fd0f2e34da292524e45e62e7398821/wasigulidubovigal.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5325f10a9---83526364932.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/107abcf786d4c413468df8c178a425c0/zezozemomixow.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc96b20d619---bogojoxas.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e257df08f7---bixezitogazuxenuwereb.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/98695461537.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/wezesod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=sdr+currency+to+usdPDF 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_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 10352 bytes
SHA-256: 4ae21c793b3b775dec047816d819d88b11e96858b553b2b4743550cb059c335f
font_01_sfnt_off00011ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF1 17604 bytes
SHA-256: 0a560e3eaa5d46b72e1a655d99bea70cf3d9fe2e41e0391a9a65c1b18012175b
font_02_sfnt_off00014d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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