Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a1d1ab36fcf92a…

MALICIOUS

PDF

88.0 KB Created: 2021-09-12 06:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 58e8f04333315bf68300754b2a4c92e0 SHA-1: 7d60c061adc8065e5ec9ea352c1af69745c8b944 SHA-256: 14a1d1ab36fcf92a2785b29e38c9d9f6500370394b3279e02cdb5556283e33c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to domains that appear to be compromised or disposable, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://huntic.ru/uplcv?utm_term=nearby+sharing+apk PDF link annotation
    • https://fiberglasssupplydepot.com/userfiles/files/mewexi.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109100623588826.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/55936124561.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/gogokuzugilovalutojox.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/wewojusutaxatabawiz.pdfIn PDF document text
    • http://hoigolfbinhthuan.com/users/files/mijukosamakutuwexetejafus.pdfIn PDF document text
    • http://topstec.com/d/files/xipodukuvakumuvob.pdfIn PDF document text
    • https://nls.vn/upload/files/89024069947.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/67204155808.pdfIn PDF document text
    • https://badrivishal.com/media/4266365482.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/86c9a19997fcee19f0e576280087b094/wubezija.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/89750867249.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/12800182567.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5cea64a2b---fogewi.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/figejajij.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/mg1d02o0lkqi8b1oq82vikiu4q/sovasogubewoxebejatiso.pdfIn PDF document text
    • http://jimsclub.net/new/board/img_tinfo/file/20210905163548.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/87727716121.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/muluzisasatuleji.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373eef7d3c7---nopimabomaroxafuzuxevonug.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/57016945958.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/61530859008.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/29636383823.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/80848700326.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/74117041129.pdfIn PDF document text
    • https://qkon.ca/images/file/digigudoxa.pdfIn PDF document text
    • 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_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 10588 bytes
SHA-256: 25e01c64f969667bd1f69522073495ba53303329bbd078ebba50616ca263211b
font_01_sfnt_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 20608 bytes
SHA-256: f97611366e7aa924cf6d7e20323f97ef156e25758baeca05b6f6e65579682662
font_02_sfnt_off000139ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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