Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a680cd4260ba2cc…

MALICIOUS

PDF

80.7 KB Created: 2021-09-08 08:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5c3366ccf1c9a6ad30946f9950465e32 SHA-1: fafbacaa8fa794941ca6e04eff01b48612853b6a SHA-256: 5a680cd4260ba2cc69da38176d20ddf3f5040b046f42e31f6f35a60730676e1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content or visiting credential-harvesting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6489f3aa---2711571793.pdf In PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610e3b21c3971---ripabisew.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/29264480987.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c3c0bb32---seboduwasawusezokapiw.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/fuxawejir.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/84373353271.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/67211513282.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/39694489201.pdfIn PDF document text
    • http://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/76723665290.pdfIn PDF document text
    • https://tepihtrava.rs//files/tutugakulokevipafo.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/2nqv97tce64n3n0igj6s9oim0h/22973519654.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/1259e65396a2ea243c6bb96a8fd20c30/48638838672.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a67aebd4ff3d41ce549cfba4fa175756/7156969145.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a95cc9f0951---mawawululujiloxavutuw.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/3bd60f11aec540129b58a38c778e9f85/nufenikidesiziduvejis.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/vazexebizaras.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/95371037129.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b1941be73---6502755598.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/lafamaxuworakepiz.pdfIn PDF document text
    • http://kiemdinhcan.com/Images_upload/files/buwumuzopidebatukenedu.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/potuxuzasegoj.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/guxojuzolivilezi.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/8565924838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=snowflakes+printable+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_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 10884 bytes
SHA-256: 1ed6245db6a5f1e8a05236a7eb1ccd71fccf63da5b27146438259e0c5dcbdfed
font_01_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 17312 bytes
SHA-256: e95b88edd4377fe79e47410b9115585eaf9eefabe1d2dd8782fe077ed795106d
font_02_sfnt_off00011ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.