Malicious PDF — malware analysis report

Static analysis result for SHA-256 beda2d34672d632e…

MALICIOUS

PDF

88.3 KB Created: 2021-08-06 01:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 72b10b1444801e65b31a2567d753b6ae SHA-1: ccaa374d96bdcceb1cb0c315a1d3798f64cc5944 SHA-256: beda2d34672d632e39de6d1e3142777f109bf38e65e5656877451f958ca48b32
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware or facilitate phishing. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16083a57cdf1d1---totovux.pdf In PDF document text
    • http://effektfilm.de/files/file/topidovudawuvozonunod.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/sn9egic1g0hpuraum1cuj8d7pk/12214070287.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-14/20210514195348471831.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/3hqu73md53m5hcukh8jh98e4bl/35416733486.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/594398b5c01f5cfee3397be2730ccbc8/rejag.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/wekina.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/69131953136.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/016f0e46c624fa4501d4498282a61f78/tizisujazexe.pdfIn PDF document text
    • http://myphamasia.net/upload/files/98627547753.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/5706770111.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ddda94a9267---41038298091.pdfIn PDF document text
    • http://wjcopy.com/upload/files/61807990825.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/zituwonotazoravuzo.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/8785414640.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/74073113821.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a07bb89ee61---sagezozomof.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/44006812017.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c519ba5fe00---matezibapafuxobax.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/refopumenefovasimitide.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/92200341686.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/b8kkcciddovrigdvna3fn3bsn3/manuzo.pdfIn PDF document text
    • http://rogalafamilyreunion.org/clients/0/0d/0db8e8e54aa701f14f52e26b989c21c2/File/14553091658.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5e5f7f67e---kozob.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/lesutadevaluza.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b1c296184---11016668555.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/bigidefukaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=leaked+snapchat+database+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 17568 bytes
SHA-256: e36f8ce0c47d5349d0918fd34df96f6dd63ee6227165d3881eb2a2bba94fb6f7
font_01_sfnt_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B78 10692 bytes
SHA-256: bd2230d52aed02459f60a98adafd49149f2be8e72512ec0e3aed7c9c03a46455

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