Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec24b4fde5413c8a…

MALICIOUS

PDF

80.2 KB Created: 2021-09-23 03:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11a3f9235489758c4f6e4da4caaa186c SHA-1: 58a9d1b8d021c8163b0aab7c4cba999265adfec1 SHA-256: ec24b4fde5413c8a59b55c49af494286917fdfdc6546d7eb60fc6293f88c13a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tonitomov.com/picture/file/86311059249.pdf
    • http://www.malagatour.es/ckfinder/userfiles/files/pasinutalurarefegode.pdf
    • http://biomax.shop/filespath/files/20210904062159.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/45686341739.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb35866447---lobirimixax.pdf
    • https://ultralloy.net/upload/files/bofojovonuwukuw.pdf
    • http://sklepjola.pl/userfiles/file/74072591866.pdf
    • https://viadagio.be/userfiles/file/vitilobojo.pdf
    • https://oklogistic.lv/upload/file/lilimimubakunarego.pdf
    • http://opersan.com/file/fibadajexiwezidejod.pdf
    • http://webinaris.blog/ckfinder/userfiles/publics/files/vetenotaxuvulasarusanis.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fec42663b---desexetivosadojaleribo.pdf
    • https://acavacecio.it/userfiles/files/vubunupubagiz.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/4m6it1lnbsuiu10j9kfbbt7t64/lefoguboxopikitafoji.pdf
    • http://inoxbienhoa.com/upload/files/75725882434.pdf
    • https://panama4d.com/contents/files/goparepomivusofatijasut.pdf
    • http://bora.su/ckfinder/userfiles/files/95836086799.pdf
    • http://cpgny.com/userfiles/files/tijenipinipawiligosiko.pdf
    • http://quranday.org/userfiles/file/82228788352.pdf
    • https://mimpishio2.com/contents/files/pinuxepalanijotugugese.pdf
    • http://jeanthompson.nl/ckfinder/userfiles/files/pedidozuvaw.pdf
    • http://veterinariacomportamentale.it/userfiles/files/lativojekexe.pdf
    • https://lescourailleurs.com/upload/editor/file/45939696175.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ums+mode+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d996.bin
e2f294ae6feafc653689fcdcaaedd148b53f0e442d7b85835b19633bbbae07ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD996 10272 bytes
font_01_sfnt_off0000f09e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 16792 bytes
font_02_sfnt_off000108b0.bin
b7e4295337a2ca25323af15bc60672de539af8c7104e6a2d5fe2867e9771c496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 16412 bytes

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