Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7a6ebdb2507323…

MALICIOUS

PDF

89.9 KB Created: 2021-09-03 01:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 15e31f4b11706d24aaf93cd01c04f0f8 SHA-1: f603055ae966671c5baead711998a66b91cb72d2 SHA-256: 3e7a6ebdb25073231d9e206c679b6f05542a64548064ea9a115bd0ecbac27302
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to potentially compromised websites, likely as part of a phishing or malware distribution scheme. The presence of multiple links on disposable or compromised hosting further supports its role in directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jjs86v03lut3qqf9ih6lf7r1u6/55436636436.pdf In PDF document text
    • http://ankurgroups.com/userfiles/file/54384363562.pdfIn PDF document text
    • https://ajambary.com/userfiles/file/vefenidirukufidopopovi.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/7f4a1e3692f058b1cc6659a66eb730a8/bajiwivelawovati.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/nj9f299mcaph66noijb0f1jnnn/91141976733.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/xorusosito.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/amll72c1vt66cunp1jvj34o5sq/71195518752.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/aae852e57e2cfd86c80a6ac7ddc65c99/pagijibiratutejexupow.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/vv3b0hhun9rppkep61jh3ithmf/wufofakex.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/8d2163cde2a7cf19179dbbaf9542e219/naxosopuriwega.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder/userfiles/files/29178751834.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/sp6762l525ev9evpmccmndj8e7/65571877422.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/28303596369.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/zazedaruda.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/38558720049.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/22051682194.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/be23094558a87e4a5f38b84c7f559622/laxalakafaweweluxunubemub.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/e1r4jiaboqjcp9d0r6uj0ajcep/98447938240.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/tinodedot.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecb3f443a4---ziwumaborexi.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/pagesiperajovilunulin.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/rarozezimineb.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/3c60b3704fd9cd1052163c1389cfb9a7/7024878904.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/fd1c6ab9bd86b035efed6d5a9aa443b5/54821231158.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=thermomix+aperitif+dinatoire+59+recettes+faciles+rapides+et+saines+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_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A98 11252 bytes
SHA-256: 9e306c6da4a40b3c848a4c5f26fc6a600351db900994cba79b40139d11b27278
font_02_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 20068 bytes
SHA-256: 8080e0b8e322b766d5eb38768c5801fc7f50d3718899a9cc022893560a773220

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