Malicious PDF — malware analysis report

Static analysis result for SHA-256 217868c222a65628…

MALICIOUS

PDF

89.8 KB Created: 2021-06-27 02:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eaceb5d492e567cb79af6fc76f979995 SHA-1: 62e9a66660b30b23fa38f4dec91aed61a9d0cbcb SHA-256: 217868c222a65628736f796892c4c31737804b2c63f57d0aeaa78e494fc6d0fc
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites, indicating a phishing or redirection attack. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit vulnerabilities. The file's structure and numerous external links are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://banphimchuot.com/userfiles/file/gubujajode.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607689897b206---fusofebipazukapimatevira.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836ade85b67---dazigonasusezexomewori.pdf
    • https://pcstaiwan.com/ckfinder/userfiles/files/wurupazoni.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/0b50u9e78lr0k3ucu3n727kdmm/kavexawataxe.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/qdf3a6bshfhivp56607q4700jt/10920328817.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a035f524635---1108109255.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080db389b976---48803278801.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814b9cbb7f2---36555100670.pdf
    • https://bio-obst-und-gemuese.de/userfiles/file/50997892333.pdf
    • http://synthecinter.com/userfiles/files/6521621010.pdf
    • http://originalcheck.it/public/img_admin/file///linokawedikiwezefonufuzi.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/xufexavumipala.pdf
    • https://promise-land.com/upload/file/gurufazebun.pdf
    • http://pusancard.com/userData/board/file/basisor.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/vb6u71uaqnptlissrqhd0sd2kq/30817935010.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5572290c0---21265908864.pdf
    • https://bbmint.com/userfiles/file/puladajasetezupizupopoke.pdf
    • http://high-keenltd.com/userfiles/file/35988293907.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851f8395e74---jakel.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e7a8553954ae269731a81903a3dac50e/2189018580.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160813ff7f3c98---72479163650.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5dae9d10b28986716b62652788da0e00/bezip.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16079de46a24a4---86548433717.pdf
    • http://giftboxvietthuy.com/upload/ck/files/21638604126.pdf
    • http://aldo-ins.com/userfiles/file/21250621768.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=20fit+container+size
    • 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_off0000ef2e.bin
8052e7c63fa133b6f9fd035b0295ef6ebc5a7ca7703ba5906e30f23b38c70254
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 29036 bytes
font_01_sfnt_off00012852.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12852 16792 bytes
font_02_sfnt_off00014069.bin
ce977131bf9482d8e6644b2aa1074dd9dc445cc4fde33036bb13f9dd76405802
pdf-font-stream PDF embedded font (sfnt) at offset 0x14069 10488 bytes