Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bb9469cb8cec74…

MALICIOUS

PDF

449.2 KB Created: 2021-07-04 23:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 600cb76c9256dd9754a144bde4b49bf5 SHA-1: 7f8dbe1e64242d8d16c2d3e8b411427fdf0db6bf SHA-256: 72bb9469cb8cec74db220bc5531a0f765e7198782d542c2ff8215c36d5e07d2a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with several pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. No scripts were extracted, but the presence of multiple suspicious links indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9647

Heuristics 5

  • 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.
  • 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://master-sign.ru/ckfinder/userfiles/files/jipupigobizirivisita.pdf In PDF document text
    • http://sevimticaret.net/userfiles/file/94028728569.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/82591827969.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c063e70c4d---49878168534.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a179c9a16---dijele.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/72995208537.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/jitanewazuk.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/p5gd5jafnu3825ll4i9lr0h9o1/pepox.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d66259906---16875101116.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/26f1cae48f2b310b2e830d471a18be6d/javejepaxodisebukoworowu.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/10ab127854ce20d7e2002afc5e97b5a9/durususarozevidagineron.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/507e8a82586f59361d73b6a7a09e0482/65665487133.pdfIn PDF document text
    • http://bakoca.hu/files/file/livulikogelosilo.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608505578353b---39284166379.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719fc181d1e---danas.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/d988b77ee2cfe9f865894e779d0b9fb0/30737406214.pdfIn PDF document text
    • http://amdind.com/userfiles/file/16963749519.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/27645574571.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b00283102---74822250448.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/vupidulebanozun.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/kezinavapovikogup.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/21467736496.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e8b39891831d22710f3e331af6fa5445/96322858295.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/04f2f39ca50ef0d53cd9dd41fa777f96/75109289602.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/febufegemibujeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=old+evergreen+songs+tamilPDF 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_off00069a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4C 10684 bytes
SHA-256: f6f4030ad193848b94b92447fa94fbfe05027cda65aa5364fe6b91972ef8c70e
font_01_sfnt_off0006b292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B292 17320 bytes
SHA-256: 89313fce4e03ddd07adc72325ae69789eb19528f1078a14af487938c4cdb48bf
font_02_sfnt_off0006dfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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