Malicious PDF — malware analysis report

Static analysis result for SHA-256 10946958f0c10372…

MALICIOUS

PDF

89.5 KB Created: 2021-07-24 01:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e54c439247423f39ff620794c7f9eb60 SHA-1: 32b6d3efab2355c0b44266d382cb1bea578f1375 SHA-256: 10946958f0c103724ec65582bd29ae7049eee54775fc6dd27d2153a035416c27
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage, indicating a link farm designed to lure users to download content. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ad2b62b3---73547356549.pdf In PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/fc6b54b8fa0bdbe7838ff2236505739c/welezivudurud.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/27131635323.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/88120855908.pdfIn PDF document text
    • https://daismene.it/file/47573861320.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/50571766645.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/tesavexofiguxe.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/dufurasutisugekeremudoj.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f36fecca97---22170691787.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/93499764635.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/45225528240.pdfIn PDF document text
    • https://artbynela.com/uploads/file/9336005076.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/92868859212.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105181608491534.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/hc9ncif1svvvqp8mffpu3pmubh/dasufugivopipuxe.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/lipafikoparadaxudoro.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/64058823454.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/wajato.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/lapemusebave.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/12553472746.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/nuzufitafogifib.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e5ebc80ad0d---xadawolawazuzewijibogan.pdfIn PDF document text
    • https://icbacademy.com/upload/files/33164269240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=penguin+tamil+movie+download+tamilrockers+isaimini+2020PDF 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_off0000f8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 11300 bytes
SHA-256: be1ff70d43b9c62ad06f7ad3cef41dc15ba5be9b23dadcc5b77d5f190aa61a5f
font_01_sfnt_off0001134e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134E 16988 bytes
SHA-256: 67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b
font_02_sfnt_off00013f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1