Malicious PDF — malware analysis report

Static analysis result for SHA-256 480e4bbcd1f373cf…

MALICIOUS

PDF

86.1 KB Created: 2021-09-18 10:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b685ce8db27eb1782f0a58a8008f4c4f SHA-1: 4bae751e60e184d967b10097b31c28fb98e675f1 SHA-256: 480e4bbcd1f373cfecb8ab77e4ac3a6f1d262df59ffd15421ee65b70ffa5e361
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. Heuristics indicate it functions as a link farm, pointing to multiple compromised CMS uploads and disposable hosting sites. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cantarefides.ro/admin/userfiles/file/jugabolagapefebivinop.pdf In PDF document text
    • https://s-serviss.lv/userfiles/file/negojazidino.pdfIn PDF document text
    • http://kovospm.cz/fotky/file/70614742356.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/qvt25r0atdo998cap812nkkdud/2703896375.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b370763a390061d0edc6139430d13d73/ririjuvizowepaberojasomem.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/9424896943779a6a42f323d7d055fc29/wabupoj.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24895777557.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ranuwazozumef.pdfIn PDF document text
    • https://agatanorek.com/files/file/3891998035.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/wemunofitak.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/juzirijudor.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/zukejevuvebosezizezopa.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/gosefofejogupupiwazugur.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/35212096815.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/dupitakejibatuwexojivopuz.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/zuxixusotaderumexevime.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/biganevovipiwibemibu.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/jovajinejajadikesopup.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa319a8ba0---64542368743.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/87765394914.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fixisaban.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c9a7f3709---16290648987.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/gonebofogigomawexoj.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614532a5872cf---xikesim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=minecraft+winter+house+designsPDF 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_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 16964 bytes
SHA-256: bcb0f3b057362abeaf753f7f2e09b19ac2b3b5ac5de3b1d4e4f0228e69f0bc8b
font_01_sfnt_off00011903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11903 10888 bytes
SHA-256: e321e92c23abc4a74febedc5f735c54795d2d81417c369154bb2c28668854f84
font_02_sfnt_off00013207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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