Malicious PDF — malware analysis report

Static analysis result for SHA-256 318ed2c474556acd…

MALICIOUS

PDF

89.2 KB Created: 2021-08-01 01:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3834c2f4340c14f4834b1ec0b300e347 SHA-1: eed5e48bae311234ae13ae1104ceebe6570c6211 SHA-256: 318ed2c474556acde0bb307b7b915c0c7efd0c43c1a79b8d9d75f38c061adcb7
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as a link farm to distribute further malicious content or phishing pages. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a deliberate attempt to create a network of disposable links for SEO poisoning or to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075d0ae6dcf1---96454808169.pdf In PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/televeniv.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b520cc09f---kekuvoworum.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/b3fa6037d68a928f9dbb6351ce82a88b/22564152404.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d9c684150---tafusebozaloz.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/wotoworutunojomupofovene.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/4adb121141eb315199432be22d7bc191/57942778931.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/54194368045.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/56230698725.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/notaladunexo.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/vidulifirad.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/fowekunilapew.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/21287917417.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/701166d2b027188ca17b24b7943c023d/74803471119.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/564b38df4b5c6a401039b9179bc91914/zovawivegijaxabemuki.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/93834063302.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/6d6a0667ba75dda5804ac1197bccbad8/29431504482.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/mixizub.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/22792132474.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/66158735974.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c810dba354---wawafivumajosabesi.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/xijenatusixemobizep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=worms+zone+.io+-+voracious+snake+v1.2.6+mod.apkPDF 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_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 17276 bytes
SHA-256: 57ca352b65ca420fbff54701250ec66b5d8350825c1c78149c79716cbee23ca8
font_01_sfnt_off000121cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E4 11280 bytes
SHA-256: f921e542c7247d1361b3a343fcb3555ac5c8cc031acd037e6cbc2a97a50a87d8

Open this report in the interactive analyzer, or submit your own file for analysis.