Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29731091082062c…

MALICIOUS

PDF

85.2 KB Created: 2021-09-02 10:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c33138f458d7097061d4fa5349bb72b1 SHA-1: 03957a29c7f33d2c641a3a4e77e8dddbdbfd0662 SHA-256: a29731091082062cdefc643f405c4b6bb919d863071fba7b5d2f8b6bbfbbf60d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://coolinterier.sk/upload/files/lakogawifupigu.pdf In PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/6db70ad71416ff06d6c2fc3a0d157a7c/wukokis.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/kazomolewoluluwupizegewas.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/v5h5h8q7tdmq57of8sag4n1vcn/49814654090.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/h62np85ct21h07bbvqavkp01e8/9122686935.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/vuvedadeven.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/velotazajitodigosafifi.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/xinilerito.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/61ff5d1c910e67a44b47e5a790a1ff90/totagon.pdfIn PDF document text
    • http://fabtur.ru/upload/files/pegifisuzasuvozufozekadi.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e17192b04e---gagigasisalame.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6cb1dc8d---rosakobimemedomunubaxo.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/44157557318.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/wedebojobazopetu.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/5969543057.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/sesojoride.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/nemexuzarok.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/safasojowuzoxadotikoweze.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/pozopu.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/a2b8f6d3761cabcf961ede400b83b8d1/tevapavifuxeledun.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083751bac0b7---vedaxanavug.pdfIn PDF document text
    • http://zae.me/datafiles/file/38378995342.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/9b463a1d34855a14e8b7f34293a0ebda/43103818511.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/62985177446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=website+localization+servicesPDF 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_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 17880 bytes
SHA-256: 22b1f766140ce88b5cfc6e4157e8a8746ad99d414c74632b0e21a955104801b4
font_01_sfnt_off00011714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11714 10484 bytes
SHA-256: fda7c4710e5d312096ac3b45f7bb648027ff6f8ca5a43082baa55abe522f19c2
font_02_sfnt_off00012f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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