Malicious PDF — malware analysis report

Static analysis result for SHA-256 547d0a26666d197e…

MALICIOUS

PDF

110.8 KB Created: 2021-07-28 00:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 67947c484b97bfcc1bb9ffd15c0c4195 SHA-1: 373e356a63f7f9e20d1a3333d934b60ae3ac3b07 SHA-256: 547d0a26666d197ee6ff0704e1d82333d475b18ab9108e15f92de241a7923579
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS uploads and disposable domains. This pattern suggests an attempt to lure users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nanyangtextile.com/userfiles/file/fosedikuvenipibiweveda.pdf In PDF document text
    • http://agiusfuneraldirectors.com/files/file/mivinajawazadufexetumo.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e32fe6826f57b7573a801a3310c926d6/17036511578.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fa068b33f9e3eaf93eaa59706b03267b/sukuvejojavu.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/69805744810.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/kiwub.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/e40b4255021330420dd116a3879e7886/90817994070.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ad79d21a0---folovunagobutusikemujewo.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd52c2ea731---70207464420.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160abce426514e---bumuvedegakujazul.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/68797232879.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/5l03b5fkjgg62ggnjc198mnd2o/62459696398.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ce9390eb3---89842034196.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/61917069844.pdfIn PDF document text
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/71642543525.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/84763148740.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/58491288970.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084dea988861---53963155293.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/mapabajekujosaberokivelep.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/5030b8f37d4106d522fb80794781a1ea/25886955107.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/katamejevo.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/wuredefinorazajituwikof.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160967f3a64a4b---fizanadotutotoredupibe.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/81aa7e794708ba970dca48b4994f33f3/55870071827.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=harry+potter+and+the+chamber+of+secrets+summary+chapter+16PDF 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_off0001496e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1496E 11312 bytes
SHA-256: 03f6a215a94528075e9fb97d6dbbdf4d81a75e61ca4f28b52065335dace2aded
font_01_sfnt_off000163a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163A4 18300 bytes
SHA-256: 53439c032e713cac0f52cb94a70cbc0c3e2cf010b87dfbf4b8554a5222970bcd
font_02_sfnt_off000193a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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