Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8ce332d6b9cca9…

MALICIOUS

PDF

96.1 KB Created: 2021-07-17 18:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e9419164d087a7f230fae4cd257cd30e SHA-1: 6f70f673a77dedd98c85ba1c9062a3a9ba9bc23a SHA-256: 9e8ce332d6b9cca9c03a1a704491c058fe109943cb9431754d66e44a510e97fe
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. It functions as a link farm, directing users to various compromised websites and disposable hosting domains, likely to distribute further malware. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to obscure the true malicious destination by using numerous intermediary links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/5c2159b100af456b82743c0875188540/xeniwomo.pdf In PDF document text
    • http://yossy.biz/userfiles/file/71569389718.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/53739531864.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/duwovoxikivivawirezus.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/21685308843.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/e21a08d1de44f8845b7441325386bc29/55850962221.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/54973304889.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/5791c8b3f345401a81313945e86987a9/tupejeloz.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/1ulc4i6q17v2h3d1eauid609tn/tidisexitosamemajegi.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf09bff051e---boretodonasakanuwuf.pdfIn PDF document text
    • https://moscowfashion.net/content/xuploadimages/file/23982987507.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607065145ec19---kimeg.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f36a811d85---98658167984.pdfIn PDF document text
    • https://shopexpert.com/app/webroot/files/userfiles/files/vapetiv.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bdde61837fa---vejurajined.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e3f4eadceeb---jijozinagibesawivixeko.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/pixuwigojigij.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd792f1ef99---supalemasunulotasin.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/benezexegafupijopimeneniv.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/h1a47rjf6hvnnrgdjr1tc5p2c5/55596957036.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/7df926a0c329f3fc0a6b0678286ed847/nopamufinuzubobadudewi.pdfIn PDF document text
    • https://ascii.tn/web/cgi/file/fugotu.pdfIn PDF document text
    • http://apvn.info/userfiles/file/61945335975.pdfIn PDF document text
    • https://airbays.com/userfiles/file/25929559092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=application+letter+pdf+free+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFC 17556 bytes
SHA-256: b2fd2d04965827eb67035c6ae9852ff2295c6b149b9ecd5ae397cef5ba441c0e
font_02_sfnt_off00015ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ACE 10512 bytes
SHA-256: 2124da8f1316933db882927735a845e34ff3afadc32d83e0c1c9932604b050a2

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