Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b5ba2c87389ad8…

MALICIOUS

PDF

88.5 KB Created: 2021-09-14 04:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1b0640d444e67b9bcbe081febaf47bb3 SHA-1: 61582e743f7bc1d4fa4c08f9172bafaa0f4c76c8 SHA-256: 96b5ba2c87389ad8bf2ee9c4f03d31961f95b72b9bbd0a7152005d9174f81d2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://weldingportal.it/userfiles/file/rezativuzunuto.pdf In PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388b7ae15f8---pureradabema.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/ratadejofozuzogidanabew.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/87867898224.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16139e86f708e7---xipupi.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb3c6c8e43---sozajuronituteritomo.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109120549173088.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/tamimi.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/e754f08fd6febc2621aa776a56810621/toposemokuwito.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/29598824237.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/49988552627.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/jawumugoto.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/vitajis.pdfIn PDF document text
    • http://nincity.de/inline/file/61835878466.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/duseb.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/15441564265.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/zivepasas.pdfIn PDF document text
    • https://salonrewards.ca/images/file/kuzulo.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/99590407e8c38c9989967b95a631d88a/gedolega.pdfIn PDF document text
    • http://www.andreapondika.cz/file/relaganewebugupuduzefok.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/jexegav.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/4afcb1cf47fbd48709041008d0d9c826/valopenanegegufufanejerup.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sigun.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/98533153915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=it+full+movie+sub+malayPDF 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_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 21292 bytes
SHA-256: 8d29bb271cee6d8f02f43b39a15677e83f09078754e649e1986cc0e7c352c871
font_01_sfnt_off000123ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EC 10544 bytes
SHA-256: dec1a75ab49a01727012d12bb8c1fefea96b22479019fc4e7f257376086ef764
font_02_sfnt_off00013c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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