Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fb66e2c2ec3320…

MALICIOUS

PDF

88.0 KB Created: 2021-06-30 06:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49d97cd015ec7af2dceef677427aeeb5 SHA-1: 57b3381b57105ab6ca021b1c305a1010a6c67ac7 SHA-256: 08fb66e2c2ec3320a372e780520585b4f2db2289b30c74f57624bc1f5d5f4f58
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised CMS upload directories, a common tactic for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL targets suggest the document is designed to lure users to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f01de7bbcd---fadodilezomodatu.pdf
    • https://vinacomvietnam.vn/uploads/news_file/64407128668.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4bc0433b9---buguxoximadumubaturapozef.pdf
    • http://debden.org/userfiles/file/76052394913.pdf
    • https://bluetact.com/locktactyuma/userfiles/file/29511611556.pdf
    • http://yuha.be/_files/file/vaxupawelet.pdf
    • http://fly.no1-yes.com/userfiles/file/jalutetuxemasol.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2a0814f58---wekovevefojigajoxodamebu.pdf
    • http://alimentosldm.com/userfiles/file/78756865395.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab73065dccb---jifivemose.pdf
    • http://bjallstar.com/upload/file/50880162984.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079308a97409---19090536029.pdf
    • http://guides2alpes.fr/uploads/file/jenudapupetaxadap.pdf
    • https://verandapattaya.com/userfiles/files/6128772076.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/1d998d46994a12e0bd3d0419def30682/nubafumel.pdf
    • http://animationcoach.com/userfiles/file/vuvudurebodetolofoxefure.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/2jms3107jrl130q3arh1fc8l8g/pusogikuparalazamulegifo.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082980f1ad4c---pajakelovulexakozafasoxa.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/13d04961e0ca24b762bb45088ac29524/goziveximaruxirasuwu.pdf
    • https://mobile-translator.eu/app/webroot/media/files/dadulegogimamivobure.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/3k35rdovja3br0l78un2m7ka6u/99340211006.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cc315e7a3---veluwegajekas.pdf
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/wifoxuzi.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/frfk8o0mvfjngiqq67gc7tuet1/60840328448.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=cocoa+powder+cookies
    • 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_off0000f1a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 16792 bytes
font_01_sfnt_off000109b4.bin
89ffa330df8c570cda92290f69b9d62391dc784a74546b217be1036a1367a6ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 18404 bytes
font_02_sfnt_off0001398e.bin
2ca0729f5873c94d4a03ae1ea8741871d62e9abb511226e4189e4719b7f1df3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1398E 10468 bytes