Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabd4aee11e07002…

MALICIOUS

PDF

85.8 KB Created: 2021-07-14 06:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0db44d102a955adcc4049752d3d43596 SHA-1: 1831419f786bc8507c7a70b8f19e22139dfd937e SHA-256: fabd4aee11e0700213231e6def3143ff4feb64cb9f5e240ba9785305688b8188
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or SEO abuse. No scripts were extracted, but the presence of multiple suspicious URLs points to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d49c262e---galoda.pdf In PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/zirafunerunovazisetipim.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/31154df5f194f4d38a8694ac190577f2/4158274284.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/22ec36ad17d4e276a0021ec918bba248/22645140202.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c1f998d30---lomegafaruzitan.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/9772d842713428e6eea2b4ff616afc57/roburaba.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/pobozibagunotev.pdfIn PDF document text
    • http://vce34.ru/attachments/file/bazamavipe.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3b31e913d---dugoribotitakisanuriwuzox.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adad09bd163---welavomexafeti.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/vafedixexuwararoja.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/iufe02rtba46l3ptg3svm400oe/55894513276.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/61326515308.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a44146e53---63245994020.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/9725865662.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/f22fb538db62b1c1b469be85640e4e92/xosezajegogipuva.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d916fdcfd1---39450439025.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/94ufpagvcnt5fq8594icbb1l9i/vuriwi.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087dffb138a5---vamiboxux.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/72285874979.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823bfc9eb77---pitowekumabotaferaxabu.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/b392bba7852bbc335b2641c2b13e75b0/bonolifujabexisisosazamek.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/51707946909.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/rijukazuwipakujebidezu.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb30ddb7e1---tepavodofomunadibami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=play+2+suit+spider+solitaire+online+freePDF 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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 16892 bytes
SHA-256: 5956e4371174b21dd4caadc2452d71d7a0d5881f1c784f9146f6fb53c06989be
font_01_sfnt_off0001186d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186D 10828 bytes
SHA-256: f0e6438ff1d62c6cb1c497a5df1321d7fbd70b2c9ec47f4d23b26b8880fe3d14
font_02_sfnt_off000131a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1