Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba82dfe4eeedc9cd…

MALICIOUS

PDF

85.6 KB Created: 2021-07-01 21:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: afdf917686ded6bc18b0bd3b494302c8 SHA-1: 7b953c625a106071475a3844f369c5c80c757691 SHA-256: ba82dfe4eeedc9cd2570fd71e4b300cf2f021a69e714ae0280a64c2d4d401270
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://oniceh.ru/uplcv?utm_term=work+from+home+deductions PDF link annotation
    • http://tafgambiatours.com/userfiles/file/podanulusamunosodet.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/c46d7c94577a70b6df08618c523b4ac0/61234904933.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/f85367fa70645d71ea7e89d40be4ffeb/61670384706.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/12292512009.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607f073f1421c---26027579849.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1828f5aaa44634999d6d706240d044a0/71009655707.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/19240740109.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/22889fda4f6da80300a19c831b168b32/nowujavilonemulixagalo.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1c2dd8891---dinudunabosilosoragisopuf.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/0e6c051ff03b595c6757bf3ba875f86c/94819397228.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bacb63bf69---76021284494.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/borumidelimogogib.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ada9386e748---vadotafifu.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8ca2dc685---25799663526.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/21342135401.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02b46ad380---33840904951.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e01aa168d---25084641771.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/89719003447.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0214e92236---diwunajekovenaferozefe.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/m0mn9ua15drgbnl7rj13tmvuhp/kidolumivaregejamajilili.pdfIn PDF document text
    • http://dominopark.pl/public/upload/ckfinder//userfiles/files/kasogo.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/01fafe75731f4994badb4464a55426f2/97434437124.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/gopexalitedesagumunabirid.pdfIn PDF document text
    • 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_off0000eb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 17428 bytes
SHA-256: 2a2c4e51e441b9822c21b4b2c93e55361045edc5bac0b62dd8ed8b0a9d51362e
font_02_sfnt_off000130fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FB 10716 bytes
SHA-256: 948abb043705a25c8508540c78ff5eef0996e6ad47564b36f5d489ab82a1a77a

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