Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a700209d24192f4…

MALICIOUS

PDF

75.3 KB Created: 2021-09-04 00:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4f81f044638184aba27a9172e43fd1bf SHA-1: b67d8381ea1fa2ca0f118b389d3131d7aee8f25c SHA-256: 4a700209d24192f4eb8a4adb688399417e9daa4f79a9a97e9d8a0af78dc8a870
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and link farm characteristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/535123928859dbf9f2a82065afb36361/kosepixerako.pdf In PDF document text
    • http://feg.vn/uploads/files/furategigo.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/q9ci7rljjakpm1r711geqhh734/pesobume.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ea8d7f434203937202dada8715666473/6543785859.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/35588232417.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/7tqt7glbnnidli6toc0338daro/fefet.pdfIn PDF document text
    • https://bamor.org/userfiles/file/sawubimatuxi.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/sikewakarozudizejugonizof.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/fovumavaw.pdfIn PDF document text
    • https://www.micron21.com/application/third_party/ckfinder/userfiles/files/zafudakefupixiba.pdfIn PDF document text
    • http://4rrecycle.com/files/file/kefupefinaze.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/79453768457.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/39530186560.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/zopamazegakanebumun.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/norebojilafuf.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/11473a5465f79b9eacb5154118816a17/15946016077.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ecgmfvi7h8f1vsn41j9780r0s7/kobivasunozu.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/96938314011.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/53963977114.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890eed308ec---55620879120.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752cf043f1b---85304528003.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/fipomajapetef.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af2bc33b86---pazodisevebox.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/bezega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=adjective+list+with+bangla+meaning+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD107 11248 bytes
SHA-256: a219e4797425898098a86c5a3537e88797402bce8c209455987692529cba3755
font_02_sfnt_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 19400 bytes
SHA-256: 26b0470749a4a7522ba0beb3ede98c2b9723f88a3eabc490746b20e014d25831