Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d109860e09843b…

MALICIOUS

PDF

72.0 KB Created: 2021-09-10 02:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9911b7064794124943754f14466546a4 SHA-1: c420949c3a02c38f8af19e368e49f211fb21873e SHA-256: 00d109860e09843b6ed1ae7e3eca1e64d06b9f83534b71080257ca1d2dee2a96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://ajej.pretty-match.com/upload/files/35737678755.pdf
    • http://carzip.biz/files/uploads/files/depovowuv.pdf
    • http://podushka.by/files/files/zalarapasememopetodifodow.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613491be4c3d6---vinifevofefuvilo.pdf
    • http://namhungholdings.com/uploads/ckfinder/files/kuregexurerogisuduwoj.pdf
    • http://susasoft.com/upload/userfiles/files/74919563872.pdf
    • http://studiophotosfashion.it/userfiles/files/95462039414.pdf
    • https://equinox-e.com/upload/files/togipelalukowowat.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/68088455345.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f352a9e39---71638774799.pdf
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vibufovepo.pdf
    • http://cichanski.com/Upload/file/wobudisiwatob.pdf
    • https://jechrina.gr/FCKeditor/userimages/file/64989487412.pdf
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/93596322707.pdf
    • http://csc0351.com/userfiles/file/20210910065619_ycln6j.pdf
    • https://ms01bet.com/contents/files/54753293524.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/6vj13k6a9sjnb3o9ea5hj0v08f/35568844271.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a82680e788---vejakupesitusidum.pdf
    • http://terwaarde.be/ckfinder/userfiles/files/64503421491.pdf
    • http://tulga.ru/editor/files/96451503083.pdf
    • https://helices-evra.com/userfiles/file/5585100846.pdf
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210902055016.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613540875e9f9---bolegotofenuwag.pdf
    • https://eownauto.com/uploadpic/files/45047876446.pdf
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/tujunomofikaralilojajol.pdf
    • http://myshiou.com/uploads/files/202109051809093154.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=ram+cleanup+download
    • 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_off0000b718.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB718 16792 bytes
font_01_sfnt_off0000cf2a.bin
ed7a3683ccf8bb5aba1e26c9c039b04ef6f83ad41c2323bbf26d6f4f9115d6d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2A 16904 bytes
font_02_sfnt_off0000fa8e.bin
f242a3e25a1d3d7b93790b49adfecc476369265ffddf85a44858ffce671ae562
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 10448 bytes