Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e8ab698f907612…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 23:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b0ca584819b0e5441ee0e2d1ae0d6e9b SHA-1: 608dc7c5eee99bca7cd52a15d8f4c80ab202d09e SHA-256: d4e8ab698f90761228554a39abed93e603122e9ec3092bb198860a94ed8cd711
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other hosting, likely intended to lure users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611ea84e716c0---80500727564.pdf In PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/a6522855c8c0249b48a47072563dd271/96741976979.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74992619285.pdfIn PDF document text
    • https://gachbinhduong.com/upload/file/rexopox.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210725_052647.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783a76911c5---25938920109.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/81cee3c655e08c70902f4dfc033fcc94/mereru.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/feb0a91a57877aaeacae1eae119da399/45859398696.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098261686f36---jotawifiwunitigomalowe.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/rmv1tmjcbupf3bpr7u0cuvdals/52861384415.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/75647751179.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160826f1b112d5---59319735942.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/i3u6lmlsinp5o9vlpbqvnrnh3g/fubusukakazupaxemodeka.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/58640302112.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/7589925450.pdfIn PDF document text
    • http://viajesalaos.com/webroot/img/files/74086622646.pdfIn PDF document text
    • http://stadiumhighschoolclassof1965.com/clients/0/00/0080f9a3d0f10e930bcfc39f0a940e94/File/ligisedoxa.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/fie4itk44vjiubjv5qdr28r1mk/povasijekogetedulazera.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16199095861772.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/71745399371.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/wubaximimido.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/xogotebativalafigalurivag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=copaiba+capsules+doterra+pdfPDF 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_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 10780 bytes
SHA-256: 0ef923c7e90f62e8903697021a9a7a64bc1d70918ec42f4506615f982e3e8c02
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 18456 bytes
SHA-256: 86f7695b7317ff5295fa3b993444624211d8d3f86543ab0e32d40334c74c56ca
font_02_sfnt_off00013291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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