Malicious PDF — malware analysis report

Static analysis result for SHA-256 a162c81801f4a790…

MALICIOUS

PDF

95.1 KB Created: 2021-07-08 09:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ad8464266562e592d503c994b7c3856 SHA-1: a212a746f1e6c1410a69fa50772f3fb4cc969d84 SHA-256: a162c81801f4a790e4684e6c55b1d536af72c3e1d6b8a0470a5ddef96f3ac64c
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://arablift.net/userfiles/file/84658464944.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba51a58fb6f---97484678066.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c952ccd25d---sitijuzofexasopiru.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/801e593cc62fa954e4c63e2ced3d8813/82265383164.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f007a4c808---30571783948.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/3ugamnr7vk6a2jsel54au17786/22367822536.pdf
    • http://blueyee.com/upload/file/240909367976.pdf
    • http://1mosref.ru/ckfinder/userfiles/files/newemovofunos.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/1473b1a5404acfd8d18475339d290ea1/70762235328.pdf
    • http://utuin.net/files/fckeditor/file/18720809534.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/e9c5ce760396946e5e1c2603bd895d3b/wulifidabikibara.pdf
    • https://lecapsuledigian.it/file/xujamigidabodokeriva.pdf
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/96818290963.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/06dfc17800712065c4807a6e75a4760b/82934835591.pdf
    • http://zrdb-drogbud.pl/Upload/file/50955030862.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/b57gioq65r9c12s56g6d02rkkh/xitivumejukizibenetevimog.pdf
    • http://yilip.net/userData/board/file/luvopolosajumurekuparixi.pdf
    • http://standdominica.org/files/files/nikofikunuvut.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a89c0263158---saladuwepopa.pdf
    • http://border-inn.com/CKEdit/upload/files/83571503411.pdf
    • http://asianmosaicnyc.com/userfiles/file/rorafulufevi.pdf
    • http://bitite.lv/media/txt/122/file/840840664.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/48cb65ec3d27c0025312988d69e0a4b5/buzogedabipibil.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=cheat+codes+for+midnight+club+xbox+360
    • 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_off00010738.bin
1eafc76ec5f4b2751d2c907cefb749fead48dece809a1c48d1f2ca946c723a59
pdf-font-stream PDF embedded font (sfnt) at offset 0x10738 11760 bytes
font_01_sfnt_off000122f2.bin
6289a1ced6a8a45163338c1595acd9ce5248013cfd898ba0343eda8fbfd1518a
pdf-font-stream PDF embedded font (sfnt) at offset 0x122F2 20432 bytes
font_02_sfnt_off000155bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155BB 16792 bytes