Malicious PDF — malware analysis report

Static analysis result for SHA-256 48da69a1274f68ee…

MALICIOUS

PDF

75.0 KB Created: 2021-09-15 09:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dd06572b6ef4058ecffcad180142a424 SHA-1: a951d1bbfdb2c45122565b64cfa7f26ddebf04fd SHA-256: 48da69a1274f68eea3f389b5d20b50fee50d79ce821bf77942791850f938168e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farms suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a3a8a2962---resowazos.pdf In PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/pukukobudigof.pdfIn PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/56703488206.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/fuxusuji.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/wedivufimaramutavumolixu.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/72659097397.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/wilusutepaxadim.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb2d98c7ba---71892333410.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614129867e6f5---75374235001.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/75200998574.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/guvaponojalutitis.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/48551627221.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/83828793092.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16138a5859bfe5---29325917369.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140918768f98---62575517623.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/tosesaxipaw.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614151424a9ad---bodijub.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/vitadazodiv.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/io57fihsdtehrc1no6294m8j90/wogiludefemonexemamin.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/botalodumudumusu.pdfIn PDF document text
    • http://zhongyuemedia.com/filespath/files/20210911192408.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/36e7a713a2b90d3d54f3124b5368df70/21162805916.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/874a53ec049b12abcd94d12124484edc/2036187258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=last+island+of+survival+unknown+15+days+hack+apkPDF 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_off0000bfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD800 17020 bytes
SHA-256: da49ff36ada772b499468df4c015240547c4e7f6b6e11769ee3abc058fa3e600
font_02_sfnt_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 11184 bytes
SHA-256: cc2e8729020e94b46ed5f29d2d9fb8574225c08eaac3f3d6f3c50614055a4f84

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