Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cfca60f49e25d6…

MALICIOUS

PDF

83.3 KB Created: 2021-08-18 02:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccac86bcb26d61b7c8fe665b2a8c91a3 SHA-1: 5545fd00a9750ccaae5d788ca4a10c7f82166634 SHA-256: e7cfca60f49e25d61dffa525696326b24d121bfad5e4c0efa2363d9246afb3de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/9eee9plfht97saotbse40jstnh/zirizovapepa.pdf
    • http://rollfactorytogo.com/uploads/files/64048264328.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610797dc229a9---xemekuvuravavidoxipuni.pdf
    • http://huefpdf.org/upload/file/zokabinoxakusozojuzodi.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608566fe231ea---31354543346.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/928e853ef6777270c65d6e4396cf2237/mijured.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/9hbdh11r08aco9jcpbct3mb4s7/97950449188.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac93034bf---bexikijapevotobabuxole.pdf
    • http://tdbm.vn/upload/files/37286414240.pdf
    • https://minipowerpack.net/upload/files/verarubororuga.pdf
    • https://sport-jicin.cz/dokumenty/mivozekexetamokip.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ec4q6peqd1f44rj24ik21iier6/noxurulosewukilibilumik.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d0cc174888960d71366279463512dbd4/wajiduvutiledaxev.pdf
    • http://manuscripthandler.com/userfiles/file/jezavudolabu.pdf
    • http://starke.ca/clients/84205/File/79977677863.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c907d810e8c---difiboderanasot.pdf
    • http://automozg.by/upload/editor/files/65808450448.pdf
    • http://ruresept.ru/files/file/62846029309.pdf
    • https://baatco.com/ckfinder/userfiles/files/zumetafomatuzosobego.pdf
    • http://zuestag.ch/userfiles/files/54549227296.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=who+were+the+fists+of+righteous+harmony+or+the+righteous+harmony+society
    • 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_off0000de69.bin
0c2e83ba0a97be4127fe447ce6dc6e3e80fbdf0b6b471b26ef844c9aff3e5f85
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 17108 bytes
font_01_sfnt_off00010ad2.bin
10718fed351f09fca659a16f0f8d01b2a57fbbadbb1bf522b1c22cab251a70f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 11028 bytes
font_02_sfnt_off00012476.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 16792 bytes