Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6b5de595607aed…

MALICIOUS

PDF

101.9 KB Created: 2021-06-28 04:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 517d721d268ce910074ca2fbb366b4d8 SHA-1: 7103cd587ef5f0c81ec65a1e09d9ca491b002914 SHA-256: ed6b5de595607aed18cec3e80348afb188da0e88800d26a742a58b71210a47cd
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the links likely serving as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/dp2h5fmnrcsvl9v1imnq2aq574/jekewolojunovivapuburulo.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/4945ae7b9c310da3dd75982d7b5f635c/25432261983.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/132c81746b21daab1ebd021f6ba2c62b/83204551755.pdf
    • https://catequesisnavarra.org/guiarte_userfiles/files/11781953950.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd57e66ac98---gaxibesifumibetipuj.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/ccd25f9e4736f79ba0161c1298c705d7/bozipezobelamupumesig.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/a4f34516523feca9ae8f2ae54678ac9e/nukudi.pdf
    • http://littlepearlbooks.in/data/eimages/file/mazawevisalajoro.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/d67484tbtqrbffqnl3g3l946ur/79469743063.pdf
    • http://stacjaregeneracja.pl/userfiles/file/71744470495.pdf
    • https://soft-print.pl/app/webroot/media/files/97111185629.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e0c69eec5---selatizipigowagusefuxokux.pdf
    • https://pet-fashion.ro/mm/file/97658395651.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16092e4774fe22---33904143389.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb66aa40987---96633207618.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c06ebac2846---36360052722.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2efd98ca1e---gedipu.pdf
    • http://casinodanmarkjackpot.dk/userfiles/file/mavuxemiwoleraxefet.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5747b8399---20292044719.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b947b3285f---72400304162.pdf
    • http://flywings.sk/UserFiles/file/2660681448.pdf
    • http://controldellaves.com/app/webroot/arxius/file/83770730175.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a49d982ea57---moloxojedi.pdf
    • http://bollywoodsalonskokie.com/admin/images/file/42315963175.pdf
    • http://dlzj.net/upload/files/20210529220335700535.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=political+science+books+philippines+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b2c.bin
82aa0ed6f9f461aeee7871532ffd37e1e516974a2daafc70d36fe58cb4ebe70e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2C 10852 bytes
font_01_sfnt_off000143ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x143EF 16792 bytes
font_02_sfnt_off00015c01.bin
53f672fcc4aee826cafe4a265c0c78958592e5af6863622883dc9c9b59e5283f
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C01 17948 bytes