Malicious PDF — malware analysis report

Static analysis result for SHA-256 080a1f2610fc93ed…

MALICIOUS

PDF

79.3 KB Created: 2021-09-21 03:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 731bae682b795fa1a57f416f57422902 SHA-1: e24ce1913987969a150bf82ef82a01c20775ab7c SHA-256: 080a1f2610fc93ed52d8cd8354da12430dd2b42516987f5664195989b17d7bed
164 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are associated with link farms and compromised CMS uploads, suggesting an attempt to distribute malware or phishing content. The presence of a 'download button' heuristic further supports a lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=sensual+adventures+for+couples+apk PDF link annotation
    • http://malir-naterac.info/UserFiles/File/vugiwewebibebebidafo.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/xevujad.pdfIn PDF document text
    • http://infosierra.es/images/editor/36815286112.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614709d10c6ea---66272829604.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/buwatadok.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/panivabekusalawur.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/sokefurasuvedijubukelevep.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/9123857650.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/ce3db16466ccefe8cd193579b80e6c9f/zijujizevumefavesibax.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/95184150614.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/71245693504.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/vujopi.pdfIn PDF document text
    • http://www.plan.msu.ac.th/ckfinder/userfiles/files/zexuwegavifoxafaku.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/38199799496.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/82108722184.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f25222b234---bagironejokifonomem.pdfIn PDF document text
    • http://yuli-china.ru/d/files/zijezedebutaxivive.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109120458377404.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/21305279719.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/73638898677.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/famixamipibuwarigupi.pdfIn PDF document text
    • http://workontext.ru/media/file/59456253244.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/885eb38a0be17869cd68a6b1af543813/tozonefewateget.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/50011856106.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_off0000ccb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB3 10856 bytes
SHA-256: 8d7ed5f2ba82901c0151057eb1d2c69c039c76f813ac66324331d3034d41dad4
font_01_sfnt_off0000e5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 18432 bytes
SHA-256: 42d9c30eaa0356a54ad517d210b35b7b017549e8f3ac916ea73becd3202fbe6b

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