Malicious PDF — malware analysis report

Static analysis result for SHA-256 deebe7ed01329b2e…

MALICIOUS

PDF

84.1 KB Created: 2021-09-01 02:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ac3f543af6207f28fa35d57881a38fec SHA-1: 6845468a5455f7f8e01efb8546d7f5d4461181c5 SHA-256: deebe7ed01329b2ea1c8b39292308d77f0090707a54e6825cd6ff69f48ad714a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded JavaScript further suggests malicious intent, likely to facilitate the download or execution of further payloads. ClamAV detection as Pdf.Phishing.Trojan-d2568dad23a94d95 confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/zeligez.pdf In PDF document text
    • http://azstorestudio.com/uploads/files/39731416570.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608da01e38e14---malofelumuputisat.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/81525647729.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/fadojoxekokelivipen.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/33187931541.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/voxasugurepanowigezaza.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/tekofowelelabojazo.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/motudomil.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/63046486065.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/tutiribujijo.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/39745443974.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/fibinuzewenugawab.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/61e1007cc7aa4f4601346ac5c2ee734c/jekodisadekepowa.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78cfcac31---betufupik.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab6ed26a37---58622860444.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/pm22e2u15m12h7ub4314giejr7/58554435646.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16115aa752144b---28750646812.pdfIn PDF document text
    • http://lemfhafamilylove.com/clients/a/ae/ae548a02e38cf20d1222216853584fb4/File/xesunifafafufawuri.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/fbn82einac3l7tn5ghsgjh9ufd/9542402149.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e97c3753428---93531538648.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/1777887523.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080878f14299---51962164341.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/46864219072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=yes+no+instant+answerPDF 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_off0000e4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 10124 bytes
SHA-256: 70acd7277a68ff7aa4ad7030f9c7f3323c95f1048ee9b190ede70d1a1a3e1244
font_01_sfnt_off0000fb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11387 18480 bytes
SHA-256: d071e32a104bbc83981d4cc78b5bda6c6367767278559849825fef76e097a6db