Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c612c07072a1014…

MALICIOUS

PDF

94.3 KB Created: 2021-06-30 21:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a8fa9a955adecd6cbc8295b67d77f5d1 SHA-1: 051154a314f74b9afbba5cf174620a1a0d82a51f SHA-256: 3c612c07072a1014c38273a903384151993e6b91df9f053307e6d50ceebc828d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting pages. The presence of embedded JavaScript (T1059.007) is a key indicator of malicious activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://adabaskimerkezi.com/upload/file/ragifid.pdf In PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/71e22475c7fc8fed91f0e521ac537f0d/dafodamufunid.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2a7670d82---82560285538.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160978cbf371f6---lakowutovedijosef.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/64dd246b1a48050eeb2463f1222e9ecd/wukaf.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/92418494117.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/2045f9f7866feb486f27720ac1accf6e/ziwukafagubixex.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5e013de138d523e05a723785e7f4465c/27354658598.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086513c87117---82900547921.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083323b942a3---pubanijezogitaribelogi.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/16928887037.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9506ac2a1---wekovegujasupulipiwu.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/bajikof.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b3d979dc---15001003287.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/9806307915.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f0e33bab04d595d0f4db34edc9b29d5/gejixigelavitatudotonoko.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/muvadunemesigixiwamawabod.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/siroligudego.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/7fd90b035ce3816a3d311589c9052a54/34704463317.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/u23rgf714r4q8t091jui7kecq5/xutizakemeno.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/33924086382.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089c34263bc9---vesenikosomevalixodisires.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e56a768807c636fb3e2d7a14a306ad4b/26430620486.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/1640513a38cfd114e21f5e0032383277/jumugelokoxefefoxaluto.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e7a7b9fd5---23078978984.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/6bjpt37vm930okmohlb477pn0f/3574305078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=top+war+gift+codes+july+2020PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 11328 bytes
SHA-256: b3ad75dc3f254c66c567766e36093bd773af5258e42ddaacb328c178dbed6f3b
font_01_sfnt_off00010d70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D70 17104 bytes
SHA-256: be105985f41c444b18bfb8fd81c156568b8f17a98c747de292e5c6e2b7425355
font_02_sfnt_off00013a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15232 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d

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