Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8784291e8efe17e…

MALICIOUS

PDF

101.0 KB Created: 2021-06-30 10:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 276f5355eef693f137162c1c746509bb SHA-1: c5ff3e28b2eb6a84b00da20ee31fd506bb4fb3fc SHA-256: b8784291e8efe17eacec974401e950d4b65c9f53a6e04603ad3ce667cf818834
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://campbellelectronics.com/uploads/lisonegadagodikagu.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/t3qr4rfbkmkgb61f4vbuk0j7t1/72394942015.pdf
    • https://atpl.aero/ckfinder/userfiles/files/waxaxirador.pdf
    • http://0vote.com/ckfinder/files/91052348729.pdf
    • http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/pinujabuxop.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac52d6641fe---48385728869.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/02592875fa201d8c16854a3a1bdf9f51/lunow.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/07b1831c7db105602b4c2f80a4622442/11466525011.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a333a63addd---19215669122.pdf
    • https://gretajensen.com/ckfinder/userfiles/files/galejafexigu.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7hvdu6kc6j8n8sj9kqo09rk03u/xukamovawitowusejego.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7b3fb16cd0a7b215dd7e1f9c740a0f37/funuxoxeret.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca120a89d1---rabizokigubomid.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609c35cd66538---kasezel.pdf
    • http://toyotarentcar.net/FileData/ckfinder/files/20210624_198F1D54FF281A79.pdf
    • http://yuhenganquan.com/userfiles/file/20210527220025_838443962.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5050cbceb4---zujokuwabajivozafuw.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac126bc01b9---jaxavatufivefugowixab.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe94e8dc75---seseka.pdf
    • http://archimax.ch/dynamic-images/cms/file/xugixexobofigekatexopona.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/35597888504.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/30f44fd0d86c41acb1f3277f7d71c473/sakejomikoji.pdf
    • http://ubest.ru/images/file/59665584751.pdf
    • http://all-pass.com/folder/editor/file/76889108721.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=looting+enchantment+minecraft
    • 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_off000127e5.bin
e4f622ab6cea0fd395d916e50bf6bd815a4100824fe7d292e4877b37b8835400
pdf-font-stream PDF embedded font (sfnt) at offset 0x127E5 10524 bytes
font_01_sfnt_off00013fa7.bin
24f4f8cf2eb202b8f4ffcb975c8e21008fd0c83e22800328038a5ebeebc199f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA7 17388 bytes
font_02_sfnt_off00016ce0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CE0 16792 bytes