Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe268695a853030…

MALICIOUS

PDF

76.6 KB Created: 2021-09-22 10:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 27168f987529cdbf9519db6b52c06ce2 SHA-1: 89be7e99cb920cd9f9e9645f5c002bd8302d2627 SHA-256: ebe268695a853030a49399ea8b2a26834e3d87d48e827178052abdcc57ab3b8f
156 Risk Score

Malware Insights

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

The file was identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be redirecting users to potentially harmful content, such as phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://warungmimpishio2.com/contents/files/sazilofazixafofebugisuvuj.pdf In PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/zomobererurefamilubevep.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/43343129457.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/livelexepu.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ef9350358---27848614510.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/80679795948.pdfIn PDF document text
    • http://land89.com/ckupload/files/92618156646.pdfIn PDF document text
    • http://phunphu.com/userfiles/file/dudujosuzeladisotu.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210917062823.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/nazawazevi.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/paradifisejil.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/mukegaropurituf.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/8427626753.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/jafifokufeziv.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338672514e9---92418833493.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad2737f427---27351071556.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/41004279018.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/tavugunajeriwigawo.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/lexofidivipuri.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161369b46bb785---87398510907.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/sumifonekinijo.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/29900314538.pdfIn PDF document text
    • http://hotechike.com/files/files/26059785194.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/99282095868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=free+fire+apk+highly+compressedPDF 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_off0000c619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC619 11048 bytes
SHA-256: 6f50968a1f1199e8c5ff51942a5064516b132c413c512f7f03ad62c8b32a5ce4
font_01_sfnt_off0000df94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF94 17376 bytes
SHA-256: 63fabcea116e18c07eb7841c0d16b0061131c535d9802614e659ee2cd1effb84
font_02_sfnt_off00010cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1