Malicious PDF — malware analysis report

Static analysis result for SHA-256 413596d5107723bb…

MALICIOUS

PDF

81.1 KB Created: 2021-07-31 18:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 059e085b65a8e7b7d0f4848a852f9fe1 SHA-1: 97bbdc3ac75c68418c35fb2376dfec3889c31ed6 SHA-256: 413596d5107723bb65df5287e934f7bcef8989e233120779f658c99bc888abd0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests a downloader or phishing lure, potentially using JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160854c9ccdee9---46578445510.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2cb26a74---90019893769.pdf
    • https://gkia.org/kingkong/userfiles/files/3293654111.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098690f648ba---3378613980.pdf
    • https://pt2-turbo-j3t.com/contents//files/vevesabakasuluzove.pdf
    • https://aashianarealty.com/file/46685496217.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/c8sqvji4cphnunai60q28psrtm/65604309538.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821a279ce4a---gozixijebawawo.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfec0db05d---86994007918.pdf
    • http://dungcubepgiangtrinh.com/webroot/img/files/wiruvokalilenojaka.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/oa5hdro0g9q2nkjgk4etno9ajs/95770281364.pdf
    • http://doubles301.jp/files/ckeditor/files/84691431639.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/78bffdccda71063e388eb790c80819d4/gumosul.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f8e21a2b39df35cab1b602225816e0e2/66931849033.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fa13a4d41---96774133361.pdf
    • http://wooshin.kr/uploaded/file/103838673260cc1c00077e4.pdf
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/rinejomavojafos.pdf
    • http://agnieszkapawlik.com/userfiles/file/50675547626.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/2c6450bd5858781176054e2dee49aee3/jipodixumitonevukafone.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/kg57qjqdrouu3ds2id4du4jho9/83506903359.pdf
    • http://abaj.cz/UserFiles/File/ferigidu.pdf
    • http://studiotecnicodama.it/userfiles/files/36203136584.pdf
    • https://patc.fr/imagesfile/95274878317.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d36785affc---zixuligovo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=teenage+mutant+ninja+turtles+hindi+dubbed+movie+download+480p
    • 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_off0000d622.bin
946ff507b3ea651a41b180bd537c4135efb7b9267d80d2cc21417706dd0ac056
pdf-font-stream PDF embedded font (sfnt) at offset 0xD622 11732 bytes
font_01_sfnt_off0000f185.bin
1d7ab0aee7611444c3174d10b0f4395270a2d387ea9a41afcc4249bc4b3c8fe4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF185 17024 bytes
font_02_sfnt_off00011e17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E17 16792 bytes