Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a9c99dce86abb4…

MALICIOUS

PDF

62.3 KB Created: 2021-09-24 20:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a21ab0beddad59699f1abfbf2cca89e6 SHA-1: 3180727e3be6ec4e353849502d1dc77e9b36b97e SHA-256: 40a9c99dce86abb423732cb2085f5bd66a73ca14866156e075006a760406f7b2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are part of a link farm hosted on compromised CMS upload storage. The primary URL suggests a lure for downloading software, indicating a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

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.
  • 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
  • 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://inwebjor.ru/uplcv?utm_term=pokemon+go%2B%2B+android+download PDF link annotation
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141b99211a6b---belenumejewikumapem.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1631991825.pdfIn PDF document text
    • http://princeverma.in/uploads/files/84014608124.pdfIn PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/78139556373.pdfIn PDF document text
    • http://demo755.webbazaar.com/uploads/jetosajagavaj.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/putomosejegiboresewi.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142a689d6141---wivom.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/sanom.pdfIn PDF document text
    • http://playoz.com/ckfinder/userfiles/files/gepebavegukozikosogiw.pdfIn PDF document text
    • https://suacuasathcm.com/uploads/files/73348630688.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210916130705314557jr2tg.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/40558652534.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/juxolixewojujudiwepujo.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/zututela.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143a93f814ee---57894108403.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/20841333157.pdfIn PDF document text
    • http://sukhonthip.com/file_media/file_image/file/10970162167.pdfIn PDF document text
    • http://ipllaser.in/uploads/pirinutinobubezi.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/babexaluxutepokes.pdfIn PDF document text
    • https://viceda.com/userfiles/file/guvovipikaronodolotapa.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614515086eb56---sewunosojezojepujidokafe.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/lijazetelatuzewugibu.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/61306749340.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/76863680472.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB271 14748 bytes
SHA-256: ba55dc2a6c7aec36630daf3e5849a28061b124527a6ae1f323a7b1c37cb50771
font_01_sfnt_off0000d7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 10504 bytes
SHA-256: ed3dfe2893454a157ec5e16af7a6cac3bc8a15ec4b203a98936feb09164aeaf7

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