Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9760e2a1caee21…

MALICIOUS

PDF

84.6 KB Created: 2021-09-02 03:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2723fa8ceb71b93ad7565dad172a8fc5 SHA-1: 09d2722e1ba202ecce1cfbab625ae4e1f6945393 SHA-256: 9e9760e2a1caee214259c9c3d0d64ce9013ec6f3c3370e3a2c8d977d335cc6a3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious or deceptive content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/97659152340.pdf In PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/sdji6tq64pdu72fpaq6p6rbm32/90043814092.pdfIn PDF document text
    • https://saam.vn/images/content/file/pikexixi.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/ramidekukalu.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf34b67d7d8---zudexazavubinojuvaseko.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/27948070562.pdfIn PDF document text
    • http://keemunblacktea.cn/uploads/file/061314337186.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/voraxe.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105a233ccc91---71988963454.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/nu5oo1bp4ggv3t1jt8js9a9vbs/dibixatafogakabo.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611287be9555f---35247001578.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/pupiwu.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/92091207552.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/tenuzonafuxo.pdfIn PDF document text
    • http://nktrading.qa/file/files/fukojo.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8dea8ea913---59583063821.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/86300412611.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/64519076768.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/83383770185.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160746ce0734e4---2709132192.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612c0ef3b536c---6707142791.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/26137660316.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/noxogugowasisamoduk.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021072315160922.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/nogax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=kings+gifts+to+jesusPDF 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_off0000e65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65C 10300 bytes
SHA-256: b75f1cf0893425837b3bb4b0f772ccabd56065dc76be2073232abc3f1c60cd41
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C4 17744 bytes
SHA-256: 0c2584882380896548155940281f4b88e2aacc9c9559379275ee4d576079a29c

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