Malicious PDF — malware analysis report

Static analysis result for SHA-256 022179338a671c82…

MALICIOUS

PDF

82.2 KB Created: 2021-07-23 22:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 72267dc6f5e6b6235939db9a59cdba51 SHA-1: 07717b614ff2c800ef7381aa4b40f17ee5efccfd SHA-256: 022179338a671c826088b96477d10ee4a8e676ef2dfce0b9049249b02c5a14b0
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress upload storage, with numerous links pointing to external PDF files. The presence of these links suggests a phishing or malware distribution campaign, where users are directed to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160859987ba612---keririko.pdf
    • https://zlatartopalovic.rs//files/12204898816.pdf
    • http://globeksa.com/ckfinder/userfiles/files/82074841523.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a7d663e72---gezoporanugevibasafa.pdf
    • http://www.allatpatikapecs.hu/images/file/13702726311.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/logmev7ob1v5lep6t959d5udtu/vagewi.pdf
    • http://sushi-belovo.ru/files/vusosisilopemokikatudeba.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/1f18db42cb108939e1c6a6179bf8bdba/mazulosokan.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ttmftn4m4g5rdcci5qdhgvotij/napitoligadutejisododaku.pdf
    • http://ahxxzx.com/userfiles/202104/file/39215767215.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/68699876a6df605ba4a48f746b079f04/lituwefoxifanatiwo.pdf
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/kataj.pdf
    • http://robalton.es/Albums/images/file///63534641282.pdf
    • https://annjulieskarpmo.com/userfiles/file/mojomebazenixija.pdf
    • http://apsencollege.org/test/fckeditor/file/viven.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/03e301a135383defccc1d8b89fa3e597/35966260424.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/39bfd7a894979553042bc9c4f2403a66/jadobefizebovoxasitelu.pdf
    • http://esthebel.de/userfiles/file/78889819394.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/67d4af6c8cdb2d0a1718739df525b2ad/74754760595.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da1fd83d64---45642350668.pdf
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/votaretoxolitagatug.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b95a9e2f19ed48e21a1e31d478dd820b/nesijutapelirur.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfb57bba2c---kafabelazexupetus.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=qu%C3%A9+es+una+mezcla+homog%C3%A9nea+o+heterog%C3%A9nea
    • 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_off0000dcf0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 16792 bytes
font_01_sfnt_off0000f507.bin
8690e47382c047f66aee3c48193aac5dd5f91ca8246ef38e5473e6bd9fb86378
pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10960 bytes
font_02_sfnt_off00010e26.bin
423d11a87543e2fb1ff7ae7d55cdbf9ac40e34abe561d3b3890fe7ff7f97475f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E26 16816 bytes