Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fd1a672303281b…

MALICIOUS

PDF

89.9 KB Created: 2021-08-15 16:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5bdd579e3b122e20c40eb8450da93012 SHA-1: 41408a231846067f41fe6efe3c5f768c0fd0ecfa SHA-256: d0fd1a672303281be114508990c3c6a8fe90a5a3db5cbf9f9eb3f4ed6de93efe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites. The embedded URLs and the nature of the heuristics suggest an attempt to exploit users by directing them to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://absigorta.com/E/file/35680858479.pdf In PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/204ad57bae9c18067060f68178eaf92a/pigupekeriwiluz.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/xozazagagebenakudaduku.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/tolevebefefoxug.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aeaa689586---sexujazalofufesenez.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/0095141c71f397543ef2090373e6da1b/88114777121.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/detalelolojana.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ada9182782---57528375478.pdfIn PDF document text
    • http://www.bandungmesin.com/file/79183520943.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210531142512_594744958.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd56a734424---49979953763.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b63676bb5---17953312891.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/66709fb21ddea5a1283e4cea6c219760/ziluzowomokuwadanow.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/c1541c0de6c68a0ea6d946fa29ce2f24/63764174739.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/wefanotokadupobijivejujo.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/45790078262.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/vibuop6hqjk586ekqk0fj03dku/zaluvi.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dd6c54c68---28059446296.pdfIn PDF document text
    • http://usmleworkout.com/files/file/xiluboxodedovinebamid.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/e1a4hkq4opi6q807gqkfjrsq9v/wajumagimaza.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/b8ab3dcbc9b97bdacae51baba6e9761e/37599282511.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8746661fc---58647167156.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/e8eda80c00618df00972be284e67d603/tuxuroxinov.pdfIn PDF document text
    • https://progin.ch/ckfinder/userfiles/files/15126181171.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2f5240b78---sosifulub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=passe+compose+avoir+ou+etre+exercices+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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF776 19048 bytes
SHA-256: c6bf7e258cf2a42c3f68efd3532635920a99bcce61f441064cbd685a687a9a10
font_02_sfnt_off000126d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D2 16656 bytes
SHA-256: 897e89934aa722d32284c5d49ebaa49ebf3ccadf86c82f93622591929a5f2634
font_03_sfnt_off00013e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E25 10900 bytes
SHA-256: 2096a9be94c550eccbfa99aea3e79ec41c7bf9e0ee799734bd72c491e74dfac5

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