Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8d34e272cdeeaa…

MALICIOUS

PDF

83.7 KB Created: 2021-06-29 02:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e17bdbde99d017d7c65247d311c61ad2 SHA-1: c56c3fe84d3e9f9352d76ffbca6d749f89ad09dc SHA-256: 9a8d34e272cdeeaa0893bf6d50cde2cce66ebcdea8fd234c245028fd2b2b446a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the URLs and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://krisoc.ru/uplcv?utm_term=pack+a+punch+bo4+classified
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0873438d0---pibeloturower.pdf
    • https://mongolia-volkslift.com/uploads/files/jijojulevug.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/d4ffa650e31a63483c42f83d8c67ca62/birukofa.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/93b49f7bbf07cf35a896453aad402628/lilibeb.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a042c9465---kekapasafitexivatijew.pdf
    • http://yilip.net/userData/board/file/purasini.pdf
    • http://eszixv.hu/ckfinder/userfiles/files/11019144017.pdf
    • http://fritz-fahrlaender.ch/download/sefujad.pdf
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/nozadek.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/eoqmht01a33nbs4dmm00shrgvr/nekalunejug.pdf
    • http://chanakyaaerospacedefence.com/userfiles/file/58258823403.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4456a57b54e2a0b45f06487a8cf99a58/nukelemawemogazamatarosa.pdf
    • http://sweetbasketsbyjackie.com/clients/864293/File/fikibos.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcac57ee06---77922166843.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16084453b0b115---14024628434.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/dc648584160e6a755ba54c8df8ea641c/siwuluzitubufop.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b92077f3781---78312743841.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/9u0ljh8ttgsafl872a18qjmvgv/zazadanoxidi.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/5f533ae398da260ea660332cc3b4e33b/sixufebewijisexumurusor.pdf
    • http://anandtouristcorporation.com/uploads/22872931301.pdf
    • http://ajivikafinance.com/userfiles/file/wosexo.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776041d5d1e---1390904601.pdf
    • https://aawyx.com/sites/default/imageuser/file/xizorufogerow.pdf
    • http://e1pl2.nazwa.pl/busy/fotki/file/joxironalutawavilujibefiv.pdf
    • 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_off0000e275.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 16792 bytes
font_01_sfnt_off0000fa87.bin
904ce3ec4d36250fa61fc1de6c8fb8a75fa7bac96738ade5c25585ab2f87e1f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 17000 bytes
font_02_sfnt_off000126df.bin
d52825c2446f7afb2fb457713b84171dbc6db5bc1bc4f04e3333a84405830fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x126DF 10928 bytes