Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d194856446c92cc…

MALICIOUS

PDF

82.9 KB Created: 2021-06-28 11:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d12cd31df161e051a2fa6d86301d3bce SHA-1: 346c9becb18a0422da5e25c0bb0466da418ecd8d SHA-256: 6d194856446c92cc60f8114b76b14d8b70c6d1f32795d4280b9f03aeb1c13628
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to external websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and numerous external links are indicative of a link farm designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://bulmarconsult.com/files/tilozibojarox.pdf
    • http://www.pattyn360.com/upload/forum/files/subiletunarini.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/abe3726dacebc08417c068ded70712b1/nenukuwovipag.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160716d16a7847---95633326339.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ji5itr01839k8pqq6qtjeu0po2/julozegefu.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/662d944ad7ae8593b1ea081a01c7ba1e/10121062861.pdf
    • http://sklepjola.pl/userfiles/file/28047358760.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d84275dc8a---sikepinesorewimozikile.pdf
    • http://easyreturn.store/userfiles/file/jobobijuxas.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b9095004---25435038845.pdf
    • http://brezov-gaj.si/uporabnik/file/60093911974.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5725b2318c9f3c337da6b8e9bda37430/94993587076.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4d89195bb---1541568727.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/gi5crtalakl35b6ojp33jnqg7h/33354522834.pdf
    • http://riskhedgetech.com/uploaded/file/74963839460b72e20b3363.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16072224fd309c---fonurakader.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e6bbcd3fe---6427610941.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d4457de3c---lizazowalelop.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/s8qvdc3blp7l2c404v9aouhror/ganatogewuwa.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/e38bp761vnrntd7fj1buq2hr8f/tobubigafolomuwemasix.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2681acbd03---7268492350.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b6536375c69eaf9a0ef40880e9e0a579/20905345935.pdf
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/5punvl80tt5pq0ersn7tusd384/13173205867.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=the+radnorshire+arms+hotel
    • 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_off0000e1c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 16792 bytes
font_01_sfnt_off0000f9d9.bin
deba5b2d670132342c15a4d5d455f5a2e073d3ab43f4b01f070871f1fc45bd06
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 10476 bytes
font_02_sfnt_off0001116b.bin
466ef7b3cf74cd544707ec21f2e951f9a16773dc7b4f32b6b4e84bec3033a170
pdf-font-stream PDF embedded font (sfnt) at offset 0x1116B 17308 bytes