Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f72a684f134b086…

MALICIOUS

PDF

87.0 KB Created: 2021-08-20 21:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4efcf1f9fe75265825a252b6c4d2dedb SHA-1: cd5b9ded3b530c616deab26d2dcfd1e63d9036ab SHA-256: 6f72a684f134b086081f777d76d5071f86376d056fdc724b04dcb8ca8394aa87
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external URIs and link farm heuristics, indicating it is designed to redirect users to potentially malicious websites. Several of these links point to compromised CMS upload directories, increasing the risk of users downloading further malware or being directed to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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 https://drivetripper.com/userfiles2020/files/tefudamatewa.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/120lkiqj00r340mppsspd9n9d4/nonukuromokeganorejumiji.pdf
    • http://vyveva.eu/UserFiles/File/75202225302.pdf
    • http://penzion-u-zamku.cz/files/file/42885560989.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607658c3529d2---raxuvupo.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/fff1fab712903144dfdfd3f0ef9b2e86/30835815675.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/l3c0c9vk1udm3vdestdt144e7u/naroteresenisanuxaniz.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ao2djl18ai64eqri4icp55a9ec/33952050390.pdf
    • http://kaizenlife.com/ckfinder/userfiles/files/81248627129.pdf
    • http://jp-cable.com/d/files/17298259078.pdf
    • http://michianaorchidsociety.org/clients/2/28/2832e32407c795c8d28ffe68102aa18e/File/67696753479.pdf
    • http://clinicaveterinariagoitese.it/userfiles/files/nipagajanumolexuva.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d535e189af---22045927223.pdf
    • https://creteservices.com/FCKeditor/userimages/file/bireresopu.pdf
    • https://www.sophrologue-nimes.fr/upload/news/files/34518136238.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e584bc4f8---17381200611.pdf
    • http://iseveranscopy.com/upload/editor/file/dotugikezuxafavexubi.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/kc12515gaug35flndfrrka31m3/64387945999.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082e35f3dc09---50119642840.pdf
    • http://vmkmsz.hu/userfiles/file/52539980878.pdf
    • http://casinodanmarkjackpot.dk/userfiles/file/pewiguluzemarazare.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54b26a4fcb---luzaxiv.pdf
    • https://kibledergisi.net/resimler/files/xopixigexekabatemasowupa.pdf
    • https://dailyiat.com/html_upload/file/koparupoxe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=treasure+island+comprehension+questions+and+answers+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6c.bin
e1b4e5a56caea3c252228b49541cc6b8a550a065dff79a3ee9054c389ab69187
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 17288 bytes
font_01_sfnt_off00011bb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB5 16792 bytes
font_02_sfnt_off000133cc.bin
06377f59c8952cf542be7b9e7a8435bd679e7317a108daede78326b25b26dbbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x133CC 11180 bytes