Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7313afca4d9278…

MALICIOUS

PDF

215.7 KB Created: 2021-07-06 11:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: dc32340e5c4b612ba5263cfa5d1ec249 SHA-1: 8fdc71c1e69d0460c3dfdafc80133dabeff95747 SHA-256: 5a7313afca4d9278776a979b9fc2029b432e041cbefab175c647bada29b61458
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, employing a link farm and SEO redirector to direct users to a compromised WordPress site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to facilitate the download or redirection to a malicious payload, likely for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9609

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098fe8cac6d4---kudokivudixepagimo.pdf In PDF document text
    • http://zwickerfoto.hu/_user/file/93125317830.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6a97f2d8c---80887579673.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6cca7850d---62048055282.pdfIn PDF document text
    • http://wajl.net/img/file/202173161855.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/24269272298.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc4750b04f---suzoxen.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/16138582120.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdacf1ccfe---zarol.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9d99081e8265acb63d4e76cbdaf55635/68949538386.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/82740803377.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab782926342---gaxuviwinulunad.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/xuvadowoxududavowetibod.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/witexirejinoxe.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tatubadodeluzazi.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01c6d7a9f7---putuzibujovirebol.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/50212140337.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c8c2912da---38525481115.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/piribililufuroneki.pdfIn PDF document text
    • https://sca-kc.net/scauserfiles/files/89437696209.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608313f47800c---75728820142.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076155ab47f9---81976025064.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/xuxozom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=nard+in+the+biblePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8CB 10172 bytes
SHA-256: bcd2577ac78b4c6b41950b2b271fcbce11bf572df4848a8e7752e1c8c4c49482
font_01_sfnt_off0002df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F774 30944 bytes
SHA-256: 26e941b0fe8b9952704439a2e0c6d4dbec9487ba404a4db82252a3d4acc3e18c
font_03_sfnt_off000339c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x339C5 16344 bytes
SHA-256: 76e81049ce4822518baebff0621fea34dee2a5536065f59d2e3116070c8dbbc1

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