Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee7bd4f69ab72f4…

MALICIOUS

PDF

86.4 KB Created: 2021-08-06 01:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5702a9a4d15b760152593be2f3219eae SHA-1: ba18ae0c7a8b4bb934abee6669afb072f22b7827 SHA-256: 7ee7bd4f69ab72f4552de6621e4c7fbfe117aa8e856947dd338cb9837f698909
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external links, many pointing to compromised WordPress sites, strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of this PDF. The embedded JavaScript likely serves to initiate the malicious activity, possibly by redirecting the user to one of the listed URLs or downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://laborke.ru/uplcv?utm_term=chaudi%C3%A8re+chaffoteaux+niagara+c+mode+d%27emploi PDF link annotation
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608675d87d568---wesuminisugazijal.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/bidowatigitavekupiloxumi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8810624410625d6721a792a5a7eeae65/5168249441.pdfIn PDF document text
    • http://gibisch.org/files/files/4834136478.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ef6c257efa4ca57bb8d08374dd98b3ad/99446001594.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/zagumazedeve.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887db38e95e---vuligobufededoseb.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/surevopubesiva.pdfIn PDF document text
    • https://mgogs.com/mgfiles/file/71593317003.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/vakomekufawulojotejigigow.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210623185002_u3t2ci.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/warorevubuvufi.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/33601628416.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/q7bhu5tokt3h3vfvrflok95d10/xaribukevefumuborojenolev.pdfIn PDF document text
    • http://pasted-radio.de/web/files/95737183991.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/8023875829.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/zuzofezakegasawad.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d295fb83fe---favugifolegowo.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5ecd586607ec800c9da7e438189236e9/66042500053.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/1968429344.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/wapuvarikaxolilixileb.pdfIn PDF document text
    • https://gilbertems.com/videos/file/33817576231.pdfIn PDF document text
    • http://ehsclassof88.com/clients/7/7f/7f6c4973f16106f9a1f2948091db50b4/File/77995745020.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/h3nuvd6iecvi48gf3qoeda2j6r/kupaziginefurifa.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/4501189077.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/jezevolemowezenexapapilad.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_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 20808 bytes
SHA-256: cb946ac786e39d10733970244b6341f905cdd6d5282948fa4b56125a51501526
font_01_sfnt_off000116ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F03 11324 bytes
SHA-256: 44a127b06803d95eb7256c519c19681a08a602517f7a33bc9698b97e726bd030