Malicious PDF — malware analysis report

Static analysis result for SHA-256 067694d01a5b72e6…

MALICIOUS

PDF

83.6 KB Created: 2021-09-20 02:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 303c0a7973fc3e3243a129312a6a1463 SHA-1: f6cac7c7551b3dd126cf7fc5ba18747430a63c8e SHA-256: 067694d01a5b72e6c3ac133d27357e3f078af2bb7ce2bfc79aef65675743157f
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple unknown PDF files hosted on various domains, some of which are identified as compromised CMS uploads or disposable hosting. The presence of a 'download button' heuristic further suggests a lure to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krallarintavugu.com/upload/file/57363131195.pdf In PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459efc62681---fedapefidewedimafe.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/3bn70d2cqt5c4093s66jgsmceo/gabasotuzaxolejeruxuse.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/45834215154.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109200410029219.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/fevoduxepoputarinupobib.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/73439821365.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/7374333965.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/tojokefirupadumote.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/97232908245.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/70175419814.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/dodurilabijuwatatur.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/pinawalomopolubizaw.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613df81cce692---8977118394.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/30520588603.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/guvivagugumup.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/40500685105.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/1oet49pcii44ctreqpd15drrt1/93903604135.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/44851139205.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/54358199047.pdfIn PDF document text
    • http://master-br.ru/img/file/42507397770.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/fusudedozewoduzupixibasob.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/susezozoroloj.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/e7dce4f5cfce66790b48eac709b484e1/jukaxafuwilutenur.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4bb453e0bfd3bcc8fc00b50e84052f75/31802501855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+fix+summertime+saga+app+not+installedPDF 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_off0000def3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF3 11120 bytes
SHA-256: a1dd92c911391812612f18b782708358ad09a6a215487ee65293a67a94083c93
font_01_sfnt_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 18328 bytes
SHA-256: e8dcb1251f28f3c1bf541c3420c7ff04a15bbba0c153efb4ca3873f7a6a1be0e