Malicious PDF — malware analysis report

Static analysis result for SHA-256 4553c87302f14748…

MALICIOUS

PDF

95.4 KB Created: 2021-07-08 02:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 654fadd83d14d5bc6d9f278730577bda SHA-1: c043296ecae8b918c26874a8cf3bcd31fd355110 SHA-256: 4553c87302f1474859908ab6e0188760e4fdaf2d2dfb1540c66fb1eb05f51a03
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure as a link farm, coupled with the compromised CMS links, points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://pension-erlkoenig.de/img/editor/file/73253944490.pdf
    • http://belhavenhighschoolalumni.com/clients/13962/File/vomololipi.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a9afdd985b1---gexupobesefivuwi.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092afb229fea---tolugexigava.pdf
    • http://testplanet.nl/uploads/files/43277075481.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160be7eb0f0f56---vimidogegeliguxaluwo.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708e5670337---1928441753.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/06106d888efb792c34869b7e58c421d9/dikulesupozejibetidi.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160828a5d1f60b---89232909576.pdf
    • https://harkakotony.hu/UserFiles/file/82858016347.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece58c24fd---31526102399.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608148c76ea63---bidozomigemupuxukedeja.pdf
    • http://korean-school.hu/hangul/userfiles/file/28532241629.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085fc77889c2---7407386383.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/1553fed9966c1b86eaf1933c4f39a005/63853078342.pdf
    • http://www.motorradfreunde-toggenburg.ch/up/files/43559380140.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082db5e0e44b---10819356239.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781c84e1272---28468894814.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c1657f18e---90348290431.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/cd17e348c23ee241fb9812702f15c65e/rokonigabixazawinesuw.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/b27342vv0hd81cds7v7b6fu35r/60760336485.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be3d117ccdc---nemuxepisire.pdf
    • http://waterlootour.com/FileData/ckfinder/files/20210610_0FB2443BE67C62A0.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a21094ca813---53055469533.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=php+fresher+interview+questions+and+answers+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_off00011029.bin
a39e661e1d2a2c1e73da3199eb15f87d7810657ab33ffe4f00fbd161049cc6ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 17820 bytes
font_01_sfnt_off00013ef5.bin
40ad993a4de7b01477a1e706ab1ac86611b86c070aa435032930e8a7f4784bd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF5 10948 bytes
font_02_sfnt_off00015825.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15825 16792 bytes

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