Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde4ae2bee1ca62b…

MALICIOUS

PDF

78.7 KB Created: 2021-06-09 01:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e8e1576cdebe7a2b5f2191a6f10861f7 SHA-1: 303d019a1f6ecd309fd25386c21c1608b2532dbb SHA-256: bde4ae2bee1ca62b5ae5af0d03bb2b32aae95678c5fb0ac379f2ba1201d72645
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious and a phishing trojan by ClamAV. It contains numerous links, many pointing to compromised WordPress sites, likely serving as a link farm to distribute malicious content. The document body, though heavily obfuscated, appears to be a lure related to online movie searches, aiming to trick users into visiting these compromised sites. No scripts were extracted, but the heuristic firings strongly indicate a phishing and link-distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=the+lunchbox+full+movie+online+free PDF link annotation
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a38083cbebc---zokuzafimederekakijuriw.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/gjvu4t095rio8tege3r4dhrp0p/dixivetowotujudabukixemen.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/e2b50ad1975ed9caa10efce00ad40cf0/dokawe.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/98uu3td5ns9b6bb4n6v79a39hp/xunupenizatirixu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086e81d20b04---demonozudusumatemup.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/1e21fb5b75b6f0a99fbd743ac2ac02d8/42264744643.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/agka3guu2coahgbb4ab9vhk81u/tazajupivo.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f4fbd8e8a61ea79ed3da93990af8e5f4/41138435811.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/18300819306093b4061d6de.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/42c59fe5c043f326c61daea23a3c009f/rukibolujodugonuzutusat.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/fce36e224015af10ea8ab7b19efd71c5/50420684954.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/5fijon5on8cfuriq0qt8vf6hc2/kilidutale.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a20cfcb2231---laxonemabejijetit.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a186b0abc0---renubimexa.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/87b5fe0713a66f591847fd4a05da7253/69179089132.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714eaca9da5---74490569716.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/e1bka9ikanierq6buhf58skr4i/12056821257.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 4752 bytes
SHA-256: 62ff34a3be77ea4c28b921025bdaa19ce056e3d881be6d4e463bde2daf64a845
font_01_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 10848 bytes
SHA-256: 76741b71c53798f3be497b84ea9b6421d89bfe9a5dabae53c9f9cf8b0389237f
font_02_sfnt_off00011f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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