Malicious PDF — malware analysis report

Static analysis result for SHA-256 230e992bc16ae7a2…

MALICIOUS

PDF

85.7 KB Created: 2021-09-03 23:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cc93b85c5d189aa3d912a7b5c1b1a85 SHA-1: fa9934d43d2e366caa4221fa74ddb27a30ad975d SHA-256: 230e992bc16ae7a2fff28604f9231a5f307e6a6714cc0e0ef9ce31fef4485f14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms hosted on potentially compromised or disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it is designed to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://allytemp.ru/uplcv?utm_term=schott+ceran+induction+cooktop+manual
    • https://ksboutlet.com/file/files/1826630720.pdf
    • http://alrehabourhome.com/userfiles/files/niwevarawo.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ipi65fhd4u9jje8as46fks6f85/sabetadebuv.pdf
    • http://abwingssuffolk1.com/uploads/files/97002687489.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/876f8f1290df61cc38efe3c6a6087b00/wetimek.pdf
    • http://ranaghatpchsschool.org/userfiles/file/wixosag.pdf
    • https://holocaustresearch.pl/nowy/photo/file/kipekozumalewuv.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/dufewubojiwami.pdf
    • http://dragonera.cn/admin/userfiles/file/5658942541.pdf
    • https://yptea.com/data/fckeditor/files/kugepadesujawo.pdf
    • https://digiconelectronics.com/media/13648423938.pdf
    • http://www.hmh.sk/files/articles/file/48381296141.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/2804e0309709203544da46a44d3274ba/retutojodivafunupovuti.pdf
    • http://granite1962.com/clients/869125/File/39099533716.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/rl7lbuja7cgm7kmasgq0svvou4/89744484251.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/3a9eb87831ea28bfadd40b368d7db8ba/28277635501.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/16afbeb601b97e39032fa9d429f94f60/ruporuwunafelifen.pdf
    • http://kiuanai.com/userfiles/file/gexija.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c57778e99---63986288099.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609829d2ceb4d---bigubawejasabasizifo.pdf
    • http://optikametuje.cz/userfiles/file/45618694702.pdf
    • http://childhood-matters.com/clients/49507/File/movixunibogi.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160821fd087c49---verid.pdf
    • 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_off0000ec69.bin
225bea35cc5bfed3da79b11ce036564b40e614f4d2851bc3494edc6ead07178c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 10880 bytes
font_01_sfnt_off00010554.bin
795471d3e5a425b7618690141cc286f187123565196d58891ebee0e8c9a2a960
pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 17048 bytes
font_02_sfnt_off000130ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130ED 16792 bytes