Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb1bf2b08f92c86…

MALICIOUS

PDF

91.9 KB Created: 2021-06-26 03:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a7226475ff0b00f7fa55f48d3e63dc1 SHA-1: 8fa13ee495f5d65458cdd8f05c5b16aec4d70565 SHA-256: 8bb1bf2b08f92c866a07c6ea660eb4809aaeb9e4f1e57b3b4c9bc2b84583edd4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of UTM parameters suggest a coordinated effort to lure victims.

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 https://allytemp.ru/uplcv?utm_term=swtor+6.0+gearing+guide
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1afb12b889---mikelokotojoxofiv.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/b800e0186145c3e2caf46be0d7b0f3a4/vovukikuvobufu.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/b50496476d76bba21fb3f7993c4ea41c/tibozipikovutulonuk.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/0bde3907426c1ef9a0a8f629d6980135/54157933997.pdf
    • http://techbis.pl/files/file/sugimasu.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b981cc97d---39745285231.pdf
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/76985164185.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/50460040586.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/1b0f53314ff0d4287fbb5d546d813aec/ronuwuvonitimutubo.pdf
    • http://zezoalza.com/ckupload/files/47666390095.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f01741ab7d---mevogulisijavetinilij.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/8649k9a9q3ir9hr0qa4no8nmll/kobezijow.pdf
    • https://aimara-bg.com/userfiles/file/mizulofanutugavisasudukij.pdf
    • http://franzoesischebulldoggen.eu/userfiles/file/rebim.pdf
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/86081647636.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab1a757f9---buvapagulenamemilido.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/us6utek2igvtrvq75fj7kbad10/19754592912.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74ef57ab17---73488426961.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/4frmqggqhtkqopedeki6k45m87/fasobazuzegijadi.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5713068032---limatuxamexusirokire.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/eff961mclh1huj0pvrjkh4jha1/92637619479.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/25a188021cbf3f0779032f19d8ea9ddd/nekizomap.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160969286b2bb8---figexakazewajalojaj.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc228dcf66a---4344357717.pdf
    • http://farmaciafasolis.eu/userfiles/files/woladexaguz.pdf
    • 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_off000101ea.bin
eb079d128c4b29fa432da15b77f54b06d69276e375843d51b758af3eed8d9d7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 17696 bytes
font_01_sfnt_off00012fd7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD7 16792 bytes
font_02_sfnt_off000147ee.bin
ecd1909b0b4f41c2130703a4e1a4fd2669bd983133d50509a5759e983a934b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147EE 10824 bytes

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