Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea468aadd12de37…

MALICIOUS

PDF

79.8 KB Created: 2021-09-16 20:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2931a2c159ca502a361b22caac54caaa SHA-1: 0f9a926d8a9cf939f4089fd0ed1153ffe487f93b SHA-256: eea468aadd12de374b0a6bfeac374835894456e5524e741c16f8bcc62c252096
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation tactic to track user engagement with these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crewmak.ru/uplcv?utm_term=good+games+to+play+on+tablet PDF link annotation
    • http://cdio.vn/uploads/userfiles/file/gipada.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/pevod.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4f718059fc52b0037d4f5981e600c5f9/72263650220.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/7931152533.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/duxuje.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/10189918979.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/5974015611.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/53047696281.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135704e60845---mutapilatavofotojibob.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/gunufitasuxalogelalasojo.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/kifozarudenenajixo.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/2b1b1c14148e59471e8a7b0d6bb20bef/63394167488.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/68886165215.pdfIn PDF document text
    • http://hepiran.com/cache/fck_files/file/pijurufekotemugidudowoxu.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/54629703186.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/74441722211.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/26731512142.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/24532662376.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161325813b0a6b---wijanujipapevapexij.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/54704097921.pdfIn PDF document text
    • http://mousike.it/img_ins/files/60331231758.pdfIn PDF document text
    • http://effekt-film.de/files/file/xuzigilujufi.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/22481294779.pdfIn PDF document text
    • 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_off0000d5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FA 16688 bytes
SHA-256: d39e401d9793b06e5afb4a785b6ebfc94922d65a75026d3f8bc47b4c68be099f
font_01_sfnt_off00010137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10137 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 10836 bytes
SHA-256: 2466c1f18cf6828d2d7a4495f5dabda74239d67867b1b30b131d89b03a83105e