Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e29bafac4592e3e…

MALICIOUS

PDF

84.6 KB Created: 2021-09-16 21:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7b20f38f4be4f20d6bca6e39c08086fd SHA-1: 370b5bc1f93f2c9105501ce9c5493812178f560e SHA-256: 0e29bafac4592e3e2e19c90f60df7df4e0dfd6e977ae07b0bfe6e9ed83414b44
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links pointing to disposable hosting, suggesting an attempt to obscure the true malicious destination. The embedded URLs, such as the one hosted on transcendenceit.com, are likely part of this link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6d6b92441919f754edc47f299b2f42f0/ruxafanu.pdf In PDF document text
    • http://nguoiquangphianam.com/uploads/files/tonijuxuwowaza.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/84905843606.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/zolajimanuvonakijatuf.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///gekimututot.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/4qrqg01dbghnclkalti72c82p5/84421327119.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/69243478310.pdfIn PDF document text
    • http://skrn.cz/pic/file/50727709092.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/90384175324.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/60108225525.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/78088403224.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tiwaxakor.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/luwonixikome.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/nemixe.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/botisunofukenijate.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/8319090536.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/kolovisituzotosadajug.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/6e4a1fd25a58b798bab5eab85542bcdf.pdfIn PDF document text
    • https://majubesar.org/contents/files/15813170595.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/18134574729.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/5787023340.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/lamegozisa.pdfIn PDF document text
    • https://cahayamimpi1.com/contents/files/garolazejekum.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/70789472312.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/97198084668.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/44870416366.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=papa%27s+cheeseria+to+go+cool+mathPDF link annotation
    • https://www.hoodamath.com/games/papasfreeZeria.htmlIn PDF document text
    • 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_off0000e652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE652 17436 bytes
SHA-256: 4a6346d1b7e0edbddaee037265e07e09c8814309ced9d81cb3f7b8d668f9c818
font_01_sfnt_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC9 10752 bytes
SHA-256: b54b9a3b0b240e5238b934614dc23657ec40223d62388f244e566b52266d0613