Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ebc6d87089f5bd…

MALICIOUS

PDF

86.2 KB Created: 2021-09-02 09:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ba848915f57d4c34d30fac117da16966 SHA-1: 665c098f234e9faf6e696e994b87a2b366ebbced SHA-256: e2ebc6d87089f5bd5fe564c8c605376502224dead29582d0b6a062b8c2dbc886
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the PDF being part of a link farm hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. While no scripts were directly extracted, the nature of the URLs and the PDF structure implies an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a907f6d7f27---89521572526.pdf In PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/siferumodamigosas.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/52103834135.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/71182951896.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/56609746258.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/vaxewe.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/87558789998.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ibfohqot7l3n9vdaqp2sgudcs1/82141485534.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/vavuvitikujalogalidiloz.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/29888588238.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/33394708777.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/76211445248.pdfIn PDF document text
    • http://goldenrulelodge24.com/clients/860883/File/34537786679.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-30/20210630075342793964.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8d8317b00---zajugopovaruderofi.pdfIn PDF document text
    • https://masihpt1.com/contents//files/kalivulaturibotigata.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/kowadirasizukuvizow.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a4191a91---jadomovapixa.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda019947cf---59750284446.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfb346ce78---medisoxikopad.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/xipenulefeniwi.pdfIn PDF document text
    • http://asmolmerdiven.com/depo/sayfaresim/file/9491943767.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/68137564489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=height+of+water+columnPDF 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_off0000e57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57D 10792 bytes
SHA-256: 08923e40c8f54d25f87b9fbd89220cd770751e3b2e30b8c496be17751e5e2f8d
font_01_sfnt_off0000fe33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11645 19916 bytes
SHA-256: 1299a83a5051a9b05e04c81ac1a349af6562e6fdbcfbeff602d253ec3cbe0942

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