Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aeda70b326562d9…

MALICIOUS

PDF

82.3 KB Created: 2021-08-26 02:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 01c55a4c48ac39b575ad332ce90a04cf SHA-1: 1fac47740ffa8697b43258fddcdc4dc510d46049 SHA-256: 4aeda70b326562d91c71a76d01967334537c25bebfcb0656e360baf7027025f4
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users through deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070171a381b5---xokiwawolajorovidabusivax.pdf In PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ffc4921cb---12342910045.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/h3796kv1ntr7ckmmob6hk6m6h0/xodadid.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/72074052099.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ed1220b95---22088387448.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/jilusibavajubul.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/c38f5e9ad2c7e102f79c96595f891d81/68981808615.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/61361893168.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/84039842665.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/gadirupeta.pdfIn PDF document text
    • http://apicn.net/upload/files/46930339406.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/femexosevefud.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/piohoavgpbms77pdarglu8vh3n/90459698813.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c523606c5c5---zutekosubumefedisi.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/22c0220655e392d8b5632064a5b98be9/dinafewawolumivenigix.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01fc1272e---tilazivuf.pdfIn PDF document text
    • http://talleresjpg.es/img/file/26942803920.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/58210107011.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d81ba3eebdb---witixazufawilapebu.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/femufuxon.pdfIn PDF document text
    • https://iwistw.com/upload/files/30141550942.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b886a51f610---55997918281.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/863b2d23a797882010870dba725ab15b/49918546452.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210615182807_wstwyc.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe56cf03ca---nasam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+create+pdf+on+iphone+from+notesPDF 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_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 10916 bytes
SHA-256: cd534bc4ded1e47be5e70e79650c6e59df2698c8d0cc85ffb2231721946876e8
font_01_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 16416 bytes
SHA-256: 4be6081a0a5c30e02beeb16c83c6fc0262b0cf4229554bdf4fc44a9d9527c0de
font_02_sfnt_off0001233c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1