Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebd5da61e9b19a7…

MALICIOUS

PDF

84.2 KB Created: 2021-06-28 07:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80719bfcef5d9be35f45caf919674d67 SHA-1: 062f908837761c0bcf3eba1c97eb48480d7885a3 SHA-256: eebd5da61e9b19a7ea46bd00304f026b920fa0ffdc928836385c2a4f7f4d2f8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://hacoauto.vn/upload/files/mifafijutesatojojaged.pdf
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/kuvegavud.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b54705d1---92109569472.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/a413bcaf4aa959a7c6a8c03853c19948/zozunotigikujebowepobizes.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d72e1fe85---24438351960.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/b94a5517da3c1444839af9328fac887e/13163253431.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f870cdb613---14041750219.pdf
    • https://ratsimae.ee/media/contents/file/71705827675.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7d55ecd2c---96419130010.pdf
    • http://amsasecretariat.fr/userfiles/file/66665721529.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/c39ko873ft19qnlda039olc6df/64468918457.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/s2gp2pdco68gccjvvje95k762s/63972796565.pdf
    • https://vettercycles.ch/userfiles/files/3901564180.pdf
    • http://aite-materials.com/upfiles/file/33430503504.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ba7cae316---zinuxiwojaropod.pdf
    • http://sashtraayurveda.com/ckfinder/userfiles/files/togonu.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/l0757h70ijustg6vcdf9omus68/15286422125.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/043573c47f021f830c8a4e17178202be/sesebupidegij.pdf
    • http://zovsh.com/Uploadfiles/files/782810223.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608494f3aa9c8---topazomusopodujefikew.pdf
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/wizaxatuvijemetogoluval.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0555262edcca0833afe7589c60b3f42b/latopa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=ancient+history+by+rs+sharma+pdf+download
    • 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_off0000e4a0.bin
0a8c1f268353c670a2c5e16056d995cbcb83e335c1477b97df00df771b221891
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 17344 bytes
font_01_sfnt_off0001117e.bin
965d5d21214fb3211ad31dba4b5a3375b97d3f445626f4f9a6fe1570a06c51d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1117E 11204 bytes
font_02_sfnt_off00012b70.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B70 16792 bytes