Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ca912a56341bde…

MALICIOUS

PDF

88.6 KB Created: 2021-06-27 02:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce90cb11f0239e9e54be95c5a58a2325 SHA-1: 4f34802715c4ebcc00d188e58a00f49cdb015746 SHA-256: 11ca912a56341bdec57f096b5ca2935023b69243c36ade32fdd1917ce87a32f2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample contains embedded JavaScript, which is often used to initiate malicious actions. The document also functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detection as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nuestratierrapremios.com/campannas/file/82167504714.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/lepldgovbhgnd9c2lk00agpfbe/40751077231.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0ki65r1nb1idronuq17urko9j0/xepimubikodawibaseginewa.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbabec75fa5---38576788482.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03c4e161ae---tuzikofasutajopomo.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/30259e96a3022add48d4520d9758f152/58419749285.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/5v0hmjccn0hb601dj5rsl183g7/34030835365.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f2c54da83---71675221490.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/efcf492ed36bec3fffdc196b9c4c79b0/punadimi.pdf
    • https://autotronics.vn/userfiles/file/torotekidubedetulejorup.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609839ff2cc2c---65477985031.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/00831c27f103385d8ba223cf97f9fad3/10091038127.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1696eaed---64564075103.pdf
    • http://garage-fuji.jp/js/upload/files/semademut.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/vogixegidunexep.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b98fd7c7e3e8ae77f8d9dd2fc2bf66c7/motakow.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a68457771300dbd0f5ad86c5d6da343b/tugojamalapuwirame.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/cfehr99t0tr6ni7ic73hoi0dk3/14864134819.pdf
    • http://www.yoko-ono.be/images/userfiles/file/detonotokukoluvotedu.pdf
    • http://drapa-technika.cz/UserFiles/File/15792243588.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080756e47a4a---kerevilat.pdf
    • https://led7.ru/file/witevuboselodubixuf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=drawing+and+dining+interior+design
    • 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_off0000fa17.bin
eafee10f059ff52fd1ef5352ffd766cedb3b79c2b971e16dd5c8830b6388636b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA17 17020 bytes
font_01_sfnt_off000125b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125B3 16792 bytes
font_02_sfnt_off00013dca.bin
1e1ce748b328d4323818e7b1394145e0ff74f0af566c67f96da2d856db56b8a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCA 10464 bytes