Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f60eea7e715c3f…

MALICIOUS

PDF

82.5 KB Created: 2021-08-21 11:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b9d3e3fa00ed31beb0868f15f330ea54 SHA-1: ee608e7e6862618afa4101d91156e4afe690420d SHA-256: 69f60eea7e715c3f051fb5f3112b175f6a39d135b19209d2b860227f92ea827c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to trick users into downloading files. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dahchen.tw/userfiles/file/tudoragoli.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160859ae19650b---mupubixoweb.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161102c9500b0d---xijatoromirog.pdf
    • http://njuhome.pl/ckfinder/userfiles/files/polivefuduvamumeju.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/29627339463.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb67f20e6b---nakikoxa.pdf
    • http://martom24.pl/martom/userfiles/file/xafepufewatomixaweras.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/hqm1l64jc959p1j5v6bbuofed0/14310346305.pdf
    • http://lucchetta.net/userfiles/files/16431057039.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608aec0797dc8---niwanobanafis.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160effb3ac3f76---bewedux.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0231d61afc---magadumu.pdf
    • http://caopump.com/admin/userfiles/file/vovojonebuvipotigovoxere.pdf
    • https://lawyerupsmart.com/tempimg/file/xapuxumopufur.pdf
    • https://flomogroup.com/upload/files/fozosedikiwi.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be10eb7828---41625061253.pdf
    • http://pattersonandoliphantfamily.com/clients/875492/File/84646937687.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16093b1d9c0f43---pugofez.pdf
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/16521703558.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ocm4v7icdvitv0kmnus42s6gg2/9440682461.pdf
    • http://minhledtran.com/luutru/files/40131725905.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f43b22189---76904672577.pdf
    • http://hvpeds.com/upload/contents/file/vonijurakulojiged.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=what+is+the+difference+between+intercessor+and+prayer+warrior
    • 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_off0000de83.bin
fc85b65b645d6504452d897aa705b360ca3e2be76513862b18277a2f881c5ee5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 16792 bytes
font_01_sfnt_off00010a27.bin
b93bb70116a783f1ca7a8084af4df9148731e5e1969de2b00439537b504fccc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 11004 bytes
font_02_sfnt_off00012385.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12385 16792 bytes