Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edaf05ea5900725…

MALICIOUS

PDF

102.2 KB Created: 2021-06-26 21:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1b6337dd7f9242bcb8ef521bdb3c14c SHA-1: 86193c37a61a0f4b0f12d31835f57bf715de0b4c SHA-256: 6edaf05ea590072564e12114d12e6a71cd65c7c78b62c91622990487d8c92da1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs strongly suggest it's used to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://liddellgaryfamily.com/clients/863293/File/35846161911.pdf
    • https://newtop-eg.com/userfiles/file/fafiloruvuselaxekof.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ckq8cj8nv6v2qnne1b1blfhfpt/20902189846.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e42eaab51a---zirumowesapesabupur.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608993adb58a2---1288154432.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097775ccdf0f---malomijugowapiremiwomilex.pdf
    • http://archerelectricsupply.com/userfiles/file/jafire.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b299ca18d---gaxozaxuzuvunawagixujukak.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fceab00f7b---49277593818.pdf
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/budatabugo.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081191fbc1ff---56151280777.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5da23fb46---fenifobumad.pdf
    • http://comp-art.ru/userfiles/file/59293141532.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/789095aeb26b8ec351bd4868f62f100e/bamotitivigisoxil.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/b115f004146a85bff8a1f3e8038b8ef1/61146099572.pdf
    • http://magnachip.cn/userfiles/file/20210509110408.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a7fd490fd43b5a7e16ede4d06f707c84/giwavovefotu.pdf
    • https://canionglobal.com/FCKeditor/file/pukoruxavibagef.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/2a728ce667d080c790055a7805782267/98948967596.pdf
    • https://autotrans911.com/thread/admin/uploads/file/97316361997.pdf
    • https://annjulieskarpmo.com/userfiles/file/xiveredotewurubezusolaz.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/6m52nercdh4p47vphadbp4lia7/tuxowix.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f50a09cfcc---6033153362.pdf
    • http://guinyardfamilyreunion.com/clients/62985/File/93832089623.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/kmeucd4rlmc3eec8vqlsl5gog4/zanesavifabilab.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=top+10+stressors+in+life
    • 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_off00012e02.bin
a21e735ba72960d68fd804d21b3fb71b6e8f942514c9e92157411dbff7ca3265
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E02 10324 bytes
font_01_sfnt_off00014566.bin
1be304dc8640a600d97bffde05d244a5f0f2f775a78051c755c1f0ca1dec51d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x14566 17572 bytes
font_02_sfnt_off00017373.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17373 16792 bytes