Malicious PDF — malware analysis report

Static analysis result for SHA-256 e268e8388a9de507…

MALICIOUS

PDF

89.2 KB Created: 2021-07-02 09:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 20f38f2b0f75373df849b8f1382fb684 SHA-1: 9d7c3356716f2b307edb06c8965d8d8254de2822 SHA-256: e268e8388a9de5070ec1cf37696885218927a0f8ff15b5bb07c351017a226af0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised WordPress sites and disposable domains. These links are likely used for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://chcial.ru/uplcv?utm_term=aspects+of+yourself PDF link annotation
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089767c9b9d2---64711433729.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/54611323707.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/9589c574d572d4353961e1bda93b7813/51832480305.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210618_57B35960ED768358.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a82fc20f8f0---goxoxa.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ig689rm24grbtdmo7agtelpvv9/tofekaxexixamewovifuzabad.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a96858732c8---sirodevopadamemozowu.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/62579842374.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d26c936de90---40461100895.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160ab78779c55e---datazolimoviv.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a52192381---masabumifebewev.pdfIn PDF document text
    • http://nktrading.qa/file/files/zenofelidamitewo.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210621205115.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/busabamuzuxafexovene.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/56317328603.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/58512818595.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/tizewinerut.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805e5b6114f---71804867450.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/bediwuwuzijojivosumanaxu.pdfIn PDF document text
    • http://ktcz.eu/files/files/22511824438.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/68739602260.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607784f20a55b---74449928414.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/vaxidetumojakijubageguker.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001159e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159E 16428 bytes
SHA-256: 424e6e246519a9441b89dce7834591c85909105dd7d626f995f6843db32b7549
font_02_sfnt_off00014030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14030 10312 bytes
SHA-256: 964bcde3f6a51b567e41ece0b4dc22173d9c3a3aeb72f134bc74543100f252dc

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