Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c34cf124080076…

MALICIOUS

PDF

76.1 KB Created: 2021-09-01 17:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9eda941c937c034d699654ee9e12833a SHA-1: 911518189d07a58872df6ecee8590f36b227c963 SHA-256: 92c34cf1240800762f3cdb58f14ecb447dec4a098035e4d8520272da175d0c98
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous links pointing to compromised websites, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ae013602bc3---43690129834.pdf In PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d23f8c554e---96462692877.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/patatu.pdfIn PDF document text
    • https://noventa.cz/media/files/file/zazap.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/36582990165.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160707f690fe2f---podenofeladodusolotobara.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161182f7ec2ee1---49292971412.pdfIn PDF document text
    • https://medtek.vn/storage/file/ruxigezuwevenog.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079616c0eb74---85339071072.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210613_113011.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/ttlgftgacma78ulobcd9goil7p/xoladuxujomepudug.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/98259707348.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/dotuzisutop.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a48b0a8fb87---88687356802.pdfIn PDF document text
    • https://curvy.tw/upload/files/9489174393.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160731b69ec032---jewawumu.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/20757326486.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bf7f2bc3e---57758559704.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/kazupuxonida.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/vofuxonapupuwun.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/situsositoperixedivom.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/wasoweborewubeg.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/43511deb6905bb40f93fb57d70bd5a6e/zafitasiwawe.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/77588173401.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/bubofevotav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rd+sharma+class+11+objective+solutionsPDF 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_off0000c248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC248 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 11168 bytes
SHA-256: dd574a295f9eb98efb026902101df30fed7a8d0edd81a20bd444a62c9b9a8cb2
font_02_sfnt_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 17640 bytes
SHA-256: 347ef4e274e1057dca19d4f53d2599e4f2c0ad9a0914e588d919e007113e335f

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