Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd06e06ce252a9d…

MALICIOUS

PDF

82.7 KB Created: 2021-09-07 22:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5c8b944dc39566f454a0473275e0ffaf SHA-1: 09db0d35f0628f1644cc87358d23bfd219f64348 SHA-256: ffd06e06ce252a9ddfd1bafe7fe4dc65a2f87d441509e5d71a8274e876617097
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://ankaraeksioglu.com/resimler/files/2748638454.pdf In PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b8708ca0d0d---36588181779.pdfIn PDF document text
    • http://aimic.com/userfiles/file/39873934106.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/wikek.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/gid4o2u7blvkleolp62l4tgqsk/teremalabawapizolas.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/3894a5eb41a29a86e63f64266f5b273e/bederixa.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/zenupifaweginuga.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/ccf7c305f60190bab5bed3b169d449fc/rozegakafakirofejigon.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608491391890c---piduzopisili.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/3208639656.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/592p33lffttr48kd8huhvtuld0/gewadisenenisufewanin.pdfIn PDF document text
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/tapike.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/695e9cd8ed255d2eb21ed14619c20af8/78037678299.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/445831431.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/sidukopaxujanozula.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/xitavutoxutafavifosov.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c959eea73---19654659715.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/46344043625.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/c03jmmp1s8da11aqcp7sdle840/fodimav.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/kovabiluvitur.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/nodafotaperudikopizuwid.pdfIn PDF document text
    • http://lse.hu/userfiles/file/nusabumepamita.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c997bcaacf4---sazazasalen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=upper+intermediate+book+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 10684 bytes
SHA-256: 38d8e462fefa685536be65a0357c43e79e1820d5b8eaf765fc052608d6ba1aa5
font_02_sfnt_off00010c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C83 18896 bytes
SHA-256: 13d414e19380f3ae9117048df81dd97ca1d96bac6ae6e1bff4cc13733a1508db

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