Malicious PDF — malware analysis report

Static analysis result for SHA-256 029ccb31864cd2a1…

MALICIOUS

PDF

98.4 KB Created: 2021-07-20 12:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d34086828a5a493392d9269f6c5f342c SHA-1: a7a2a517ab71f9c423e52749952c588c28927fe3 SHA-256: 029ccb31864cd2a1147b4a5f6b95b2ade16e637c3f7eafa3b84f4e66a2c6657a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, specifically within the 'formcraft' and 'super-forms' plugin upload directories. These links are structured to appear as PDF files, suggesting a tactic to disguise malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f154e0f761---gozejorujaxovudet.pdf In PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864718c8e4a---8175049087.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/29538745511.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/he009kcvu8pchi2es4b5j1a049/75462256067.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/28982419601.pdfIn PDF document text
    • http://tulsacentral1963.com/clients/3/39/398188050227c7f1c8b3045a0a865105/File/73701510180.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/csd5etcp1ooe9cir20e7jrak42/rapavevo.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/73435056230.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607dabbe2b124---34258501190.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5b9258f03---fanaturiroxavozaki.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/wegonosibujebofi.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072e44479cf7---puxaga.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/lapujaxonuzibodajo.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ac26cda3b---dusunebuduninuledaz.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078c3353e572---bolozufeduper.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c5d95b582---81450241361.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/nqi0ofkj9bgfcrlgisru8cudo6/84403265065.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/26392889571.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/xosutatis.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/75197587874.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f76288149b---vugerugapule.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/58360106481.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1bbabbb92a---51739899538.pdfIn PDF document text
    • http://falerisztika.hu/tmp/85721286161.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/fb4daef32e5ea3b5f315e6a9ff72d144/97423761426.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=another+word+for+meet+in+the+middlePDF 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_off00011fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBF 10356 bytes
SHA-256: 81ff764675b162a2535276b615a71d613fa3f8c85bc72ee5afb58305e0663907
font_01_sfnt_off000136f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F0 17304 bytes
SHA-256: 06538622a759fc28f712b6b89f57ec35f14d59b8989d54ac7441773645b74e9a
font_02_sfnt_off00016418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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