Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9accc9e9b42e39f…

MALICIOUS

PDF

88.9 KB Created: 2021-09-03 01:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b7830f8cd6147700304088cceaf07361 SHA-1: edefd8e58eec131b76263a56ab9047ec748544cd SHA-256: e9accc9e9b42e39f84a210d51ce31b44553f30717400cda343bdca23ec377a50
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The file acts as a link farm, directing users to potentially harmful content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e869a6fd6b---57369048486.pdf In PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/fc8b16aa4ab838b8bd1bafb355c4fbfe/22301229732.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16093e51c0f256---liwuzagexulapimesof.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/kijetajotigajiziti.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d181658b0c9---25352329294.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/ade9a17d725bf7629fafa43d287f41df/37986311563.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4338820cb6---luseluxugotazupolapiwokir.pdfIn PDF document text
    • http://herve-coiffure.ci/files/70608643639.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4cf0e5ca0---dupidiwore.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16259082011179.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/55124966613.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987f3e62f37---jenamitijofodetasus.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f5a55ee8---44562810592.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/26699337863.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/42338454500.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/wibivipatede.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/9207228791.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/vududesi.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3835da834---21259702085.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/reburubivefapufiv.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/roduleboz.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/3100094499.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843eee896f0---97029345186.pdfIn PDF document text
    • https://menu2uplus.com/images/file/80394790533.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d8f45da8d---nizuginojogaberobuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=can+you+create+a+pdf+portfolio+in+acrobat+xi+standardPDF 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_off0000f340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF340 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B57 11100 bytes
SHA-256: 979f27cfd19b61fba1c36a7195fc18e301c71d94fc5f127303c8e044856b9838
font_02_sfnt_off00012530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12530 18684 bytes
SHA-256: 1864e6a7c2c0966c2434444be8af9ebe276e33ba55b43e144a45c558f4669d97