Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2924a9d396f80f…

MALICIOUS

PDF

94.9 KB Created: 2021-07-07 09:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d4434966d6452111767cc091f4d7e02 SHA-1: e3fb654de029eccca7ba1fa0558126a362a563a0 SHA-256: ba2924a9d396f80f32c836b26cc92a3920baf849b80d582ce8c7ad1b72cd0ad7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malware or phishing content. The presence of external URIs and compromised CMS upload links indicates a pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/9ab9d8b77a87c04f12460aa8049bc05e/vubofug.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/12318f77dfc103a7cb7dd30ec070e24f/92547326087.pdf
    • http://sushi-belovo.ru/files/26077854711.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c119a46038---sotapatesimasag.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/o8pf9hot9i9e9rbkrrql7k8ooq/tipifasebij.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/5a91111beb55f59fcea717b23ea53612/vuwogolurugosoniziguwu.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad032ae84f---bofuve.pdf
    • https://xosobacninh.vn/webroot/img/files/duzotumosonigefuveruzade.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b865c22d056---pexosax.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caad919ace---pozodudizenofenazepowim.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/1ssbeg6ptrtatvnq9duu1g4qk0/zolakebosasupazuvalovez.pdf
    • http://moestuinwebshop.nl/userfiles/file/mupedizolem.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/a67ipad1nbh4s5plf9c1aqk510/fakilekebokefozikiku.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/2474a825a06a1aa28bc2d3e5a8fbebfb/firafugojoki.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ab92ba8a502---77298698695.pdf
    • http://kiemtoanhaiphong.vn/upload/files/dedekujuvidurifuminesomi.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a28ea961d---xiniropo.pdf
    • http://www.cerathai.com/image/upload/File/48949595598.pdf
    • http://accronline.com/userfiles/file/rebosozudanosabej.pdf
    • http://constantemails.com/userfiles/file/1624559946bijilimibuvuko.pdf
    • http://sanga.asia/userData/board/file/tokilin.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607006b8ec0fa---60597598806.pdf
    • http://articolo17.it/siti//usr/foto/files/vejixovi.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/255f00873747226f7fb901374c67959c/vegalewisavupiwab.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79a1738c5---finofopapekiduzazoxoliwu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=hype+meaning+in+tagalog
    • 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_off0001102c.bin
41dfbda16a45a797c257090f69e308a60d1a5cbc59c212613d76d443208ecc25
pdf-font-stream PDF embedded font (sfnt) at offset 0x1102C 10432 bytes
font_01_sfnt_off000127c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127C0 16792 bytes
font_02_sfnt_off00013fd2.bin
1f44b83b6db03f0c32d80397cba3249c1a0762ba2f808af0d3c9b4bd5dadb3f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD2 17952 bytes