Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2e5df5f4584b10…

MALICIOUS

PDF

83.2 KB Created: 2021-09-23 03:56:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 18117c03829040840855c4bd6b38014c SHA-1: 2472d07633b3ba9af7db8d4b34c123a5a72740f1 SHA-256: 5f2e5df5f4584b104fd3b27a0c6dfc75f49f5962c9e44abc0e093e5df7b5137e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs and a heuristic indicating a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=mxq+pro+4k+firmware+7.0+download PDF link annotation
    • http://simsvizag.com/admin/uploadedfiles/file///81085075838.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/liluvutalonololomeluwovim.pdfIn PDF document text
    • https://slicktechproducts.com/newerac2c/userfiles/file/midisesisolufedezovubura.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/powarapu.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/36684887691.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/40920796882.pdfIn PDF document text
    • https://xulynuocphangiathinh.vn/images/pic/file/xubawagorukiriji.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/72935014336.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/jinikavonuv.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/96388890905.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/voropimuwevak.pdfIn PDF document text
    • http://chipgene.com/image/files/20210903_195655.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16148d28ebe5cf---99479215778.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/75148718567.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/kuparek.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/81394307160.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a95096d7df---17360886824.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/98002655187.pdfIn PDF document text
    • http://theffirm.com/userfiles/file/foguposakon.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/vurixegalawabelelopujevis.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/patokisurowivitapi.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/58788569400.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/wotizimupujud.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/66039287841.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/79323060907.pdfIn PDF document text
    • 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_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C6 11128 bytes
SHA-256: d1a7b1b1f41228e3247f74f571261a39e0eb4b794a37677d478c633fceb01898
font_02_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 18400 bytes
SHA-256: 32ee0f390481d8b0a212eb5571f4e004b48409e008d13e182795f4a0ad7d09dc