Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabef419aaaa1725…

MALICIOUS

PDF

146.4 KB Created: 2021-09-07 23:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dbd183129898e9be492cb866e8bc4cd5 SHA-1: 8d75bec3708f82a292f76cf6455ce292aa665184 SHA-256: cabef419aaaa1725ed3b7dad13d508f629417fc3d6e97be95f21a215a1c7448e
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of urgency language further supports a phishing or scamming intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/35430325208.pdf In PDF document text
    • http://aitrans.org/UploadFile/file/F1202105091721181247.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/sosaze.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdef0c3c2d---78656902459.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/9r1f8dgvsnh05njkrhiaqtmimr/balitajurisejokejeka.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/418ac026f0471925541f3fe2222dfe44/68946073954.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/xiratopixunurunemevo.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a083dc5451---77769896510.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/ledatatuwoxom.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/90106697831.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/b1e13ebf3738efe89dd84f4213f30388/voladowexabixanokujinopos.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5dd185943cf374c6d27b6125f0f7884b/11500310050.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612e6c815df16---10851138876.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/268ef2faa07c00563d4875ea7444c8e4/49891799857.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/bf6t8l2ckvcjsgo1bst9p0lq89/29982593879.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u2hhrnl5dq5421id5vpl1r78fk/89699283106.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/33374817401.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/7bd99d1c2d9e5e37c42ac9d7ac4b82f3/56812039643.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/59a2683e04aac211291f37d2b34d2a99/93824624328.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/35868900415.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d1480459a---wolububoz.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9d68a9543---21023861895.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160f058d73cc80---sapovigovoropujexo.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/bosodazoromoxujeroxujoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=walmart+attendance+policy+2018+pdfPDF 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_off0001d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D680 11220 bytes
SHA-256: 958d843e08efc7f2a964b7569c20de6498a01ec66a10c6bf3803532104147884
font_01_sfnt_off0001f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0D1 19380 bytes
SHA-256: 46222cb6ad2958c8ba0124c9642d007e946b48c7a92d8aff0c7fdf931a1eb22c
font_02_sfnt_off0002239b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2239B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1