Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f499d404ff46e8…

MALICIOUS

PDF

88.5 KB Created: 2021-06-27 14:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 038c92d1c7a52acdec3462e657840e36 SHA-1: 3beba5f2156f3e425e1ff0606654519394b8ac00 SHA-256: 45f499d404ff46e8fde756a52ef0a342b98feadd48b8017b90bd0e3f86208e90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing malware. The embedded links suggest an attempt to manipulate search engine results or redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://amirafouad.com/uploaded_files/file/9375170186.pdf
    • https://ivanamihic.com//files/rubewalujidepamilesiv.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b5697d1ffbf5b8599320b10291e4aedd/webamunaposutezoka.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608522438776d---22966613527.pdf
    • http://gojjang.com/uploads/files/13931860373.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6129214375468408f4aa48e5c1b6c700/19534762802.pdf
    • https://tortugafilms.ca/adminfiles/file/vivubugubog.pdf
    • https://patriciobanados.cl/upload/file/
    • http://oldtimerclub-thueringerberg.at/images/file/lovesulor.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16087a8464c8b6---25059510918.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608454c7c5254---15814011361.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e36e02353---90938344563.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/174c6d5ddc2d057d284f47bca00ca288/4165286776.pdf
    • http://creptiles.dk/userfiles/file/vazusitofedidew.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f172e151c---nebimi.pdf
    • https://alakharia.com/public_html/userfiles/file/92090306163.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceea5747d18---kuniwix.pdf
    • https://indolabtek.com/Uploads/userfiles/files/lifaxumusotesekubud.pdf
    • http://biirbeh.mn/images/content/file/vomoxu.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2e2597719---51333519613.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/01fc4e02efb38fda8178fac3f2095ac8/55400781127.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/9ea383faa2123974deb75a92e97a450d/feruruzotijo.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c781eaf0de7---bokagizatero.pdf
    • http://stellamaris.cz/userfiles/90243417130.pdf
    • http://vodnik48.ru/content/file/fexiru.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=ethical+considerations+in+the+collection+of+qualitative+research+methodology
    • 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_off0000f37c.bin
c56d925100fc76ecd139f9d2060761ae84f66ad0be1ff9e245a63279a2f4cfbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 11332 bytes
font_01_sfnt_off00010d7d.bin
d4469049b40c43bf796cf38885420be575d3aeef187c06d276d50836389f7cc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7D 17796 bytes
font_02_sfnt_off00013bac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAC 16792 bytes