Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f924ef02adf479…

MALICIOUS

PDF

75.3 KB Created: 2021-09-18 02:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 062a25ed13150f64344a9f47c23389f4 SHA-1: 8d2a7a8a7cd0e23ce9301f09e7d21b581e8ab37f SHA-256: 11f924ef02adf47911dd29aae37093453d0995773cd2ffee61e67066f4235429
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate it functions as a link farm, directing users to multiple compromised websites, some hosted on disposable domains. The PDF likely exploits a vulnerability or uses social engineering to redirect users to these malicious sites, which could host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ketchas.ru/uplcv?utm_term=video+panda+compress PDF link annotation
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/a501ee974ab4475c6903a77198d9c96f/doxigamenozatuzabisoxo.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/jedogor.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/22001038934.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/70075452640.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/wibibirexokube.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/tolozazigod.pdfIn PDF document text
    • https://kultmotor.hu/images/files/lifik.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vivejagi.pdfIn PDF document text
    • https://businesslife.com/content/files/4905250020.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/losavib.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/vp51sqssibdn0ouk9tr5ofbihl/wibejopawidaratetibazixu.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/junukubajupamo.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/gamanibasapijese.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/66967015444.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/48376319227.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/xulam.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/48700447956.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/81242957047.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/garotesunaririgeto.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/puvakugitafovupeb.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161369fe9b46aa---51913250854.pdfIn PDF document text
    • http://art-ball.net/files/file/jamezevaxixemezelorefu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ivuxigemuluzujemuripis.pdfIn PDF document text
    • https://nexapos.com/upload/files/jatuxawejabixo.pdfIn 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://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_off0000c1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E2 17556 bytes
SHA-256: 78bb5235272d78c30c44d873431e7445837fe87c157e4b0fa6272944cf140795
font_01_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DC 10500 bytes
SHA-256: 3a3b1433ce1bdbfa74352b85381d46c7a132a5be891821a8b32becf775207fe1

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