Malicious PDF — malware analysis report

Static analysis result for SHA-256 47457de64435be3b…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 01:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c628cba6ee4dd109976cdd8b973d617a SHA-1: 3c1ccc49050a92f3468054e8a38a972dfc438006 SHA-256: 47457de64435be3b5e43dd61062fd511afbb938acbec0c23031dbfaa7dfe204d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, many pointing to compromised CMS upload directories or disposable hosting, suggests a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic further supports a phishing or scam pretext. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to facilitate these types of attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://ziva-muzika.cz/files/file/xenoz.pdf In PDF document text
    • https://alianzatours.com/imagenes/file/kewakajemuze.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/44890834969.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe18fcf20e---nowijevuwepivume.pdfIn PDF document text
    • https://digireg.at/upload/96316283664.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/3cbf3bf65d4865d19ea149155de8f4fd/jamub.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fbc4bd90938---jibinewuduzukogaxiwekuj.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/16177405536.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/71f1470acd56574cef8e30347d458cdb/nufofadu.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609939eb8a638---kupuvubibupuvuwoxem.pdfIn PDF document text
    • http://termocity.by/pics/files/32584148126.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/bimonozepiwexuzovizuridaf.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31769add1---64212254872.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/vifopivututazekapezi.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/46430867998.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ce6befd8---vuwepalufumole.pdfIn PDF document text
    • http://speckrepej.com/upload/file/gulavinup.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b325cf188---pafafomedenisip.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/34191891715.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/38911232017.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/1e1f35011fea41d496b9e1888a617939/83020136286.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/95382277224.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/gibomefu.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/mokopepafazu.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/47074918450.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a681d723d2f---wamofaredoforeri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=academic+transformation+the+road+to+college+success+3rd+edition+pdfPDF 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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 18864 bytes
SHA-256: 76b857f634310999691b7eae75d0c8ea1aaed8aa292d59fa734c63fdf1c0c8dc
font_01_sfnt_off00011a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13269 11320 bytes
SHA-256: 60b334c110de47afa0624705e02c3a6e9754bf1fc5fa93ad3cc104c2a65831ad

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