Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b2c09bcdca57cd…

MALICIOUS

PDF

152.6 KB Created: 2021-07-07 23:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 803bec9cbfa0bbdc609074ab0250f06a SHA-1: f1c47933f814138e4506e6c20490fe538eb4ddc2 SHA-256: 80b2c09bcdca57cdfcb59460064dca173d1b8f78788f32bf8d07424ad9f19790
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://queure.ru/uplcv?utm_term=jonah+in+the+whale%27s+belly
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/fdf89990f64a672b6c5c61f2f5611a01/75709284154.pdf
    • http://www.hangmandigital.com/files/file/gibuzaxigo.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b53cb7e60---sorebegebatetameteg.pdf
    • http://france-ex.com/74753262755.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/a97f1cffea7cbc655d7c63f7c15988f9/wasoleseburirop.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ef69fa96---renemuzogipobitonexamola.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098563f8c0e4---tosimibexeloroki.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16071dc3824a8f---57173658335.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/49092369543.pdf
    • https://pioneerlift.com/upfiles/editor/files/35889426981.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb3a618042---rozinarolodafasafobafopaw.pdf
    • http://thebookmarkcafe.com/uploads/files/wikade.pdf
    • http://enjoy.sk/editor_uploads/system/files/37691418015.pdf
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/lafoxeveximufugot.pdf
    • https://agrilaui.com/userfiles/file/biluzesejoxezemo.pdf
    • http://wohntraumgmbh.at/wapibubo.pdf
    • https://iveducentar.com/uploads/assets/file/6570627391.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/eae9f448bfb04fa7abe16e3cb8bbbb6d/54602570110.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/2ed845af202d1055592e11e271cd20f7/pokepesozorovunufibigulux.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30c164037---53507498064.pdf
    • http://spl-designs.com/ckfinder/userfiles/files/46650395742.pdf
    • http://goodslib.com/userfiles/files/mebikadafoladifadajok.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/fca15e27838e9a6933460007793028d8/7319506767.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c84a.bin
97c5b4ed3d2a5106ddc44d326eed31a40d8af86406b176fa3c1f4f93443d86c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C84A 19436 bytes
font_01_sfnt_off0001e977.bin
4e8fa818fc8e39908aa7d2bf82e1f8a2897365acd7e7aea9a799981d1944813d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1E977 10472 bytes
font_02_sfnt_off00020157.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x20157 16792 bytes
font_03_sfnt_off00021969.bin
b51e615e8bf1f2416da3799c76ec0da49b0c9335c53845ddb99d4eb821aa0ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0x21969 23820 bytes