Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c75f8d82644d1e7…

MALICIOUS

PDF

920.0 KB Created: 2021-07-02 10:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca2e6085ab0b5aa609a12f715ddd511a SHA-1: 6fd23ee03f8f37014482a067b54ff6bede5be52b SHA-256: 1c75f8d82644d1e790d20fd7aa3e587e6b5aa26e8ac188626a05a9970ca86cdf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to compromised WordPress upload directories, indicating it is part of a phishing or malware distribution campaign. The ClamAV detection further supports its malicious nature. The embedded URLs suggest an attempt to lure users to download further malicious content or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4740

Heuristics 5

  • 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.
  • 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://lucann.com/Upload/file/74523975457.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1466c2437---7110447326.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841d3978253---fivagekokuwedom.pdf
    • http://aftckwt.com/uploads/file/murugexesodebazoxoxigopaz.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/dmfp7bgg1hjue5clhncrol8gb6/89413446348.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/90194110277.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/l4eksckl8qahvhrp1vf4i5ulqh/rafesunupavamabagukuzomum.pdf
    • http://markone-tools.com/upload/files/duborolumuzufodade.pdf
    • http://topas.lt/userfiles/file/gabozaw.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2fada5d92---mibaludalakomomuja.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/e7nqlhl1mvkhu00u68330r0bek/wunekikotulemunuw.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084af4c731ef---3572420436.pdf
    • https://bititechnika.com/uploads/file/vomuzetupudidudomelofunes.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/cb85999f3822b2ae78bac872b77b0708/wujelogekedizufu.pdf
    • http://aftckwt.com/uploads/file/10350012164.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/lesepedato.pdf
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/75607475281.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/6fkia4ikk2et90u7pcmcu131bf/15890495349.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d330d214ec9732631a058009c6a62e06/4408075912.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d356b6bbceb---84644078717.pdf
    • http://multi-accueil.fr/ressource/site-image/files/xibozunemowizawosevoxuk.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/tughid0n92s5a3lr3mf2qs4r5l/ramasaweberekoxetotavejex.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cbeb18147---rifovodabalipig.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/4nut0r0f2n0t0qndr8ji7m78co/46859556504.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/i5ijm50ls9iic6v3ac9tg8qkao/67513978853.pdf
    • http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/33591024650.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=27+rows+on+hermitage
    • 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_off000ded86.bin
f614efc1e89391b79d6972b07b9493c0937c413f6bd3dd021e029ca680250b14
pdf-font-stream PDF embedded font (sfnt) at offset 0xDED86 10668 bytes
font_01_sfnt_off000e0605.bin
b18803291fe7622313efd7c9cb7248e439b31ee556d81da2bd7a2f0f51e47a1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0605 19132 bytes
font_02_sfnt_off000e35f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F7 16792 bytes