Malicious PDF — malware analysis report

Static analysis result for SHA-256 182a58e7e5ac0d52…

MALICIOUS

PDF

74.5 KB Created: 2021-09-01 04:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 65f76c6768da3ccf6ccba2246716724c SHA-1: 07509b3d9b44c483b26cf2458c5924844f25d4d4 SHA-256: 182a58e7e5ac0d522a044ad5c3cc2a2f4d864e93cc9f2537b6ab2242d4489ab2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and disposable hosting sites. The embedded URLs are designed to redirect users, likely to a second-stage payload or phishing page, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4bb554ea3---98949196270.pdf In PDF document text
    • http://yuli-china.ru/d/files/bemoninoso.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd73dbe9bf---72352964879.pdfIn PDF document text
    • https://kultmotor.hu/images/files/82835501247.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/gutuzop.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/renofinufapanelefarigep.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/sokirofazusoroj.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d7f7cf75afd44a055b6f145441f5e3bf/taxeson.pdfIn PDF document text
    • https://susta.vn/userfiles/file/vinapokigamesimeni.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/gogubosoluwitef.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/bb66fbbd8d57307e419b1b187f042b7d/fepozuwudefuximu.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/44917160953.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/muvukepitawafonukovos.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786300ba058---62316235753.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/14123155408.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf451ea5b4---xamuw.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/45611608182.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/7efbebe2e513dfa4b70948440717c46c/zolupudoxupe.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/pogoku.pdfIn PDF document text
    • http://qbcar.ru/ckfinder/userfiles/files/31588911167.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ba6ca8ee6---18432582776.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd77698036---momesimoxijinofe.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/3483cdf81cc0939e6f2d3c3bed80e4b6/kugasagadigozisu.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837bbd016ea---dezedaxalujulijalite.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/77084330618.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6ce337496---musuxabudalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=complete+with+the+wordsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB08 10508 bytes
SHA-256: e1337ba3cc3c3163333d58b654190b618d764e4bd739a7989fb1bdb97b3be000
font_02_sfnt_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 16100 bytes
SHA-256: 1f546eb14b4930880f8f399ee3b705d3c8e19f9d46323f876c6e898abe8af473

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