Malicious PDF — malware analysis report

Static analysis result for SHA-256 f897700bc2f52ea9…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 18:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 750d51c2f5c405dbdac5e24f82a778e0 SHA-1: 48ec69738b34ad1c8f6f17ea44b1774648d8a510 SHA-256: f897700bc2f52ea99a8b4ca5e561468901990eb51af4a2d66f2f97b7f7f62e6d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vidl98t55k428mssrdmiv0b8t9/72517597863.pdf In PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/noluxuzuzisote.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/71505610267.pdfIn PDF document text
    • http://come2menorca.com/images/file/23824191701.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/sofade.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5006695f1---vikejakigizedavi.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/58048639224.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/00d6faadb39c8632d3ff76bf2c10dcc6/27338114475.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/ketozoverixovad.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/57862738447.pdfIn PDF document text
    • http://15881588.com/ckupload/files/bugiguriwuxikajuxokegede.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/13109514655.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/68932090445.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/rjdpo2gosm6fil44ivhvnkfc37/masujiwijowibixumul.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/gidazidositawesodizat.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/80405179889.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/bebupag.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/7fa0cd698fa5e4e3a6535c8267a7ec9a/muwemoguduru.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210912_B2ECF05D41EDF7BE.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/97723348896.pdfIn PDF document text
    • https://akvanova.ru/sites/default/files/gasabibotekinoba.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/turos.pdfIn PDF document text
    • https://spyboarcams.com/files/15386273557.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/82111942701.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/7742739714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+do+you+see+screen+time+on+androidPDF 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_off0000df43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF755 18056 bytes
SHA-256: 714e1ce335b392dfe9b5958cf0756476bbb51acb85e5f0fd1f96cca8abb7b07f
font_02_sfnt_off000125d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D2 10776 bytes
SHA-256: 35e67e5b60e07b2ffe753651bde2b0140b7a5478402a94e2afe7dbd3703acdc5

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