Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b362cdfe6ae2ad3…

MALICIOUS

PDF

83.8 KB Created: 2021-07-04 08:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebdfe7fcfdcfde87eed46a28479f9f07 SHA-1: e35f322b1cc1bf282ce3cca03f50b5bc2b276320 SHA-256: 9b362cdfe6ae2ad3138d2c489b8386b6882f765d56eb484a82945f69fda9ada2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

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://kingdomofgodmn.org/userfiles/files/89929447671.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/0a84b5b49e1eeb323fa4eabdc57e97ab/rubaf.pdf
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/buratepisonixujalewam.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/37dec206c2e56ddf6cdbc5046a2c7263/64378188528.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/71738219778.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710e1c5d554---97305813405.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b37fdb6b0c0---tijeg.pdf
    • http://pogservice.ru/userfiles/file/30732555258.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f8a58a373---magumibinumuzozi.pdf
    • https://aspaeng.com/files/image/files/lifagiliravuburapo.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0644409df8fd5f5bfda81fd7c99d9b99/busurunajaz.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607a426cbabc0---26270029977.pdf
    • http://pivotal-technologies.com/userfiles/file/18857934514.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3f58516d0---limewuferibo.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/mkfisnaiqtpaspbsqgof5i8in4/70220971085.pdf
    • https://anmoul.com/userfiles/file/43474052541.pdf
    • http://doingthing.com/downloads/blog/geust/files/18069531842.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f6632f771---97418186790.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bd6830dc4af6b8925100395242889f1d/takunorigiwub.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/ca683c19f95462da2732a48b0cba7e4a/45281843126.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/a76645f365247ef49d542d16242b4d0f/tadumumalotafu.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/de80aa9ccfc676dea29754aae00a540b/37768490900.pdf
    • http://vdadanang.vn/app/webroot/assets/files/24435064019.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d434919b7---25394771366.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=chemical+bonding+and+intermolecular+forces
    • 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_off0000e3bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 16792 bytes
font_01_sfnt_off0000fbd1.bin
f661a81bd4aa00a98e679b66bf9b523191b9e1d1b31461d015a82ae7b59c597c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 16988 bytes
font_02_sfnt_off000127c7.bin
0c112e9c7a3fbec3e1e0df17c68b9e0fe7e3c01845c2e06036c1fbe0165cc555
pdf-font-stream PDF embedded font (sfnt) at offset 0x127C7 11196 bytes