Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32b5c05e9d19509…

MALICIOUS

PDF

89.7 KB Created: 2021-06-26 06:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a106b1776714cb9934e9358579faa98f SHA-1: e0f097ad5617878f4cbf03c6b5d9c179f60a33f6 SHA-256: c32b5c05e9d1950947a0619c8a1674f46398ac77c4eda56195f89abc28faab3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links suggests an attempt to broaden the attack surface or evade detection by distributing the malicious content across various hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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://kardelendalgicpompa.com/uploadfiles/file/kikugigimagoligijomekoja.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c810a49b6---43270207593.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/220ba15cd59e77e532dd55cf5c280a80/rijesosajuwovu.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/37tebclubrv0c9t31rbte7g015/83863165147.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/6392527c3cfce20f92908ac53d12686a/34497512829.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0bdcf093c---xelowipobemup.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607824fe25190---bazidasikibefujapeb.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41bcd7ca8---69375784889.pdf
    • http://aarogyamedico.com/userfiles/file/wevofoviwowari.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fb885a25b---73758111444.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5de03af206---25097129322.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160826f1b112d5---59319735942.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d8c1ff42f9e3b521e2a1ce4f220620c8/98973082509.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/ba91fc980015ccf0b43407d0e5cee973/71685726685.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/6cgb6mepl7a638r130vmj7oqe1/78933265894.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160757bb3dc0cc---9020679655.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/1dfu7oacfrdrdmq01mdm4h2k37/sebemim.pdf
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716e3d2e077---25659703059.pdf
    • https://lawyerupsmart.com/tempimg/file/14973957195.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7e7cg2dffsdjvce51dsf0ap557/60133004572.pdf
    • https://cgeminfos.ma/upload/file/mabebul.pdf
    • http://cdwy028.com/uploadfile/file/20210618144202.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/2dmj9jnbtrk5sipkgrpvuurke5/95380132615.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/93h2gp3ch5heej597o37io79q6/94049418901.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/36931356049.pdf
    • http://amexeuro.com/an3_Uploads/file/pozafidowiwif.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=answer+to+where+do+you+want+to+be+in+5+years
    • 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_off0000f905.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 16792 bytes
font_01_sfnt_off00011117.bin
3e9ec254a7517a3eccd76cf2ca52d4e1606d7665ff0c5478a2c1b63a5c4444b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11117 18464 bytes
font_02_sfnt_off00013fed.bin
16a10f13d4a7f134fae3e16c2014ea87a2210d53db2dba9d76edc0e63238adde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FED 10856 bytes

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