Malicious PDF — malware analysis report

Static analysis result for SHA-256 99eba1097dc77a27…

MALICIOUS

PDF

90.2 KB Created: 2021-08-06 10:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bfb695c180e19c31e4e53bc68968a3ec SHA-1: 860ddffbabf97ac0a3511db9239705e7054f491f SHA-256: 99eba1097dc77a27bbb428065e7e288774e77cb50fe7d04400735e706490f06a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to lead users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The primary function appears to be redirecting users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://catamma.ru/uplcv?utm_term=annunaki+genesis+guide PDF link annotation
    • http://kaymccarthy.com/immagini/file/lenapisoxulinedu.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/548947e3b5df8b76125873d81e58285b/88923361035.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/buzoloxekasuk.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/40f705d1688ba3db09d477cad58bbc65/2080763858.pdfIn PDF document text
    • http://thepnguyentran.vn/media/ftp/file/wawakefegapivikofewusi.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/tawawemutabogojo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8fea17ae3b---65469162690.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/3ab3f2f90f36c441039f5c6b99953a61/nogap.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/zoguwojikumuzegabirilix.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/fisebilixenabuverabaluw.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c529385ab0b---xovasaxuwor.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607146d632d76---56355624517.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/57ter8obpq4pvlvi1giep22pmd/lubuzuvazavifixerimawes.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/hsshg8kh921n4vfj9t3hip8oc1/27907090060.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/0d961bdb863be274da782c53115ca3d5/31479342683.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/51079127460.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1b3361cd4---nipolemobudanenepej.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608460d23172b---30278542847.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/punataraxagagi.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c052119bd6---63740227253.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/sojuradusafoxokaguko.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/tanoma.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/8vl2cou5ih9ic21i13pm1ptpc7/15404803639.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968e088c0a0---5452025149.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/vanivo.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_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 10232 bytes
SHA-256: 9dfe182b160b788fa169ea2d67e3f280856e26ddb3d395bd3026d30dd7758d31
font_01_sfnt_off00010f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12736 20820 bytes
SHA-256: 73c5ffbaac934f2f614b687e48bdfb2da6b1e8654385d15406752409ea1a8ef4