Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5b0e33d8ae72fac…

MALICIOUS

PDF

67.9 KB Created: 2021-09-20 22:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3e2042d52f55c66379492cc0f99ed6da SHA-1: bf70047c7d276aa6b135cc8792f4cc047a51a7b3 SHA-256: b5b0e33d8ae72fac78dd988f7b4f2ede381657ac518c3afcbce1ff9036f80d37
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=afrikaans+words+starting+with+r PDF link annotation
    • http://studiotecnicopetrillo.eu/userfiles/files/xoselesiminilanefakugepa.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/zulidakurek.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/tedeluwujiminakuvosuve.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/titobapewawosixipo.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/24173801483.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/96094516543.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c19ed620ca---dexugizotuwodowigatubudox.pdfIn PDF document text
    • http://iscelenie.info/files/file/25940449363.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091406123687.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/44137215967.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/bufidumefexibobemurud.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613cad8677555---37893391987.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/saviguvikapakoza.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/10628253166.pdfIn PDF document text
    • https://mmszke.hu/files/file/dagupigarivabepan.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/67450686471.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/pazedomojutitesotik.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/gowudezasuxa.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/67480524730.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/poporemenalefugaledipipip.pdfIn PDF document text
    • http://sns.hu/_user/file/gubox.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/nuxozusewaradimugejutuvod.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/ludosofawik.pdfIn PDF document text
    • 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_off0000ade7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE7 14428 bytes
SHA-256: 6e561a6c01ea8629ee6ca91a1220c0490aca3040a870de2178c676fef1d87a5a
font_01_sfnt_off0000d21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21A 10616 bytes
SHA-256: 9047cbf6b4d5f4ef1810d913913baefaffc88b3cb3021bfb094d67cd300419b4
font_02_sfnt_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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