Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aaecf57d50b9aa7…

MALICIOUS

PDF

93.1 KB Created: 2021-08-16 12:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d462191ca59021d0c552b7f6d3b310fa SHA-1: 4d8354f6ea15fe715129a68a0b77d6466d9e0551 SHA-256: 8aaecf57d50b9aa78fc53b7270e62da81d618d7a3527a3f6632a6b942552e2f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://perfekttorun.pl/pliki/pawavemego.pdf In PDF document text
    • http://bociany.sk/media/file/tumepopipinafezeduvemiru.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/6e2175556dd87570c95afbf31a5c7568/89492480555.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/a7be5391411df16583cd5dd5bddc7203/lewosalebogejebap.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/11e3f3b48b29e7119dc11502408c37da/61946650217.pdfIn PDF document text
    • https://ancoraeducacion.com/images/kizofugogolijonimovuwan.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/4374819559.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbda98b4c9---lames.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/6215611668.pdfIn PDF document text
    • https://pontus-sd.eu/uploads/file/76620883131.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/kewaf.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e11ceca7---47603547138.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/negip.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/71364324916.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610a818d9061c---gojijomemunonowanuz.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/42521c55e5189b8c0d685b7ab935f096/falopodupi.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/36b7bea66062871d6fd9381e8ff895de/53916488399.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/wanuxede.pdfIn PDF document text
    • http://ledson.ru/upload_picture/pularuzawavikinisaforim.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/99123356659.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116994a85778---75369909442.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160839dc525072---91602769288.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c468c433d7---vejumibelosawux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=android+games+modded+offline+apk+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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 17848 bytes
SHA-256: e131e9d104e79e0ceacb7104187a1493256b4e179c7a7ec0d03b01a789018c1f
font_01_sfnt_off00011612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E23 16124 bytes
SHA-256: ba8ff948344f645101225288c3773f7cb6e1d523548d0ffed49288b07570b7c1
font_03_sfnt_off00014380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14380 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
font_04_sfnt_off00014bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB5 10904 bytes
SHA-256: 5fcf762dac9390d7045eddeb7e2971aa33492b2d38a43d49dbc1ec253d707d42

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