Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e132aa05e4d4b06…

MALICIOUS

PDF

77.2 KB Created: 2021-07-22 19:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 620e7ac1443b7b78862d856de68a3a06 SHA-1: 2feeedf88ca9e275feb8d8848bbe7c8a03677e29 SHA-256: 5e132aa05e4d4b0651f3c83834c2ffb6e9ede3a3a761ee918719fe453d000f64
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to multiple compromised or disposable hosting sites. The embedded URLs, such as http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e531de03d---1353065673.pdf, are likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • 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://j-line.ca/fck_upload/file/dedavu.pdf In PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/danonud.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/8496339148.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d21f5e279edd090eb10725a247cf020c/lupudaloxada.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28976844296.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/63710118402.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/pomatuzomanapur.pdfIn PDF document text
    • https://beliangka.com/contents//files/lefisinunuvaxevinasite.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740371cf083---75360665264.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/bc3982ba5cd725036e5f95bdb250a86f/zususepewapesivaxi.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5b22b816f---xikigavegivijetarufuwi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869c5a48f76---folozisivupuxuzesipo.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/97d3a8beb456bc0d16de62007187d2e6/26761175644.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/533ad08266ef5159da7fba8362882101/92046947562.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/48631763431.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4877c7800abf53d863b541c80efd79eb/14307769105.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/483e09b40c0c0509a248b1844bb8bd80/debogubadoxaz.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f69d946b598---verurojosolezexanolik.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e531de03d---1353065673.pdfIn PDF document text
    • http://promador.pl/userfiles/file/43443393719.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a404b8bce62---rajatubade.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/812335147.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/70536320937.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/95683098677.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=infallibility+of+the+biblePDF 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_off0000cb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0C 10248 bytes
SHA-256: 34f6f006f3b77d18694af02be348355de19298188e8f4ccac73f287d662dd686
font_01_sfnt_off0000e202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE202 16964 bytes
SHA-256: 75481c877232a9895e103f9a6175bfc23f583b52c4f0ea9d068759943cb3acdf
font_02_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1