Malicious PDF — malware analysis report

Static analysis result for SHA-256 580515e0a9c5a1d5…

MALICIOUS

PDF

73.3 KB Created: 2021-09-05 00:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 527963ce6ab39efb131fb277789d16d8 SHA-1: 356e0fef266cd2f2aded235e14d8eb17df3da323 SHA-256: 580515e0a9c5a1d53f8c2cac60f4949e7a29912b948bdf85a623730b4f4f2eba
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm. Some of these links point to compromised WordPress upload storage, suggesting a tactic to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://szaktel.hu/uploads/file/tiranunikujafi.pdf In PDF document text
    • https://bharatbiodiesel.com/userfiles/file/93544758272.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/63701083875.pdfIn PDF document text
    • https://ecohort.com/userfiles/files/tadetuwe.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/82620709947.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba80b7fa72---verewufowitikimoneli.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7c40ead0d0b52027952428b710583e3e/45966942963.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/23419533064.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/gulowibuz.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/32320568420.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/36331271061.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/fabusodo.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/2712ecb30a5aedbfe6489746dac55a31/biguropu.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b811801c---dawixezimipopakowujot.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831d6544f9d---muwomapaxos.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ea07f3dbc53588119b1b497d83795456/farikuzuwebuw.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/barukabunebedupejaxuxifez.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/027046aa00a92ed6a5b81e0913f4dc8c/ziguwuripure.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/36638224815.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb534b301f---kesibifafexuma.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/jazixipelepotul.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7a5233e9a3---3728813929.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=developmental+biology+11th+edition+gilbert+and+barresi+2016+pdfPDF link annotation
    • 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_off0000b804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB804 11728 bytes
SHA-256: d7722ce706fc8e148ef8748ddfd58193da2efbfc10bcb923db2e034efafd2a45
font_01_sfnt_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 16812 bytes
SHA-256: 788e58695ac103262dd8e5c75e021b03ad83ad7889bbc3e6af1c1416d882368f

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