Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5687566b5c4c377…

MALICIOUS

PDF

112.2 KB Created: 2021-09-04 15:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 02ed06018c9e88f07bf5b54136f0ac86 SHA-1: 8ed41463043b045b3ec8184af54121f2ac060f73 SHA-256: f5687566b5c4c3778083aecbe7bd30588fbbb020a7da36ce96d15be4551db1e5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of external links points to a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://freehajjandumrah.com/admin/admin/uploadfiles/file/fegutab.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071904aadf28---repelowevifufaxitana.pdfIn PDF document text
    • https://businesslife.com/content/file/rizelaxixa.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/dexigowinibuw.pdfIn PDF document text
    • http://brucemaymemorialgolftournament.com/clients/d/d2/d245e0393a5bbb16d67b82808c007790/File/denirewupox.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/779e75600094edba073e891fe467c80d/98841100564.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/dunonutakusufasa.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/f6a54d35a975a9920772bffe518b7780/12925326339.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/86470280825.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbdb45d685---bolajuridavivuxu.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a7644f84---75136491886.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/sebopebizigel.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/10161837444.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/jebijotenodemomeka.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/32276378727.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/8t9f07a34avp7gt1cmat4liena/19424237479.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4a68ddd297f9ed86177c66df4386d7d8/40271873493.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/pijitipozow.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/gj7kdi5k1v1l6dl8dnlujbn1h5/monorebe.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/bifopifajosotoxojojuzidik.pdfIn PDF document text
    • http://sdds.be/userfiles/file/7802454785.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/kurivoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=historia+del+partido+liberal+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_off0001509a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1509A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000168ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168AC 20188 bytes
SHA-256: 7f9103e5c0cd0b0880630930103601f5502e7e5e4e980ba31f0411689f08c46c
font_02_sfnt_off00019b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B67 10516 bytes
SHA-256: 13acf236d3b3b4bd43247c6394795943ec53fd51a3d0809aac07d7f3e390b46f

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