Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05380d15757c78a…

MALICIOUS

PDF

79.2 KB Created: 2021-09-18 03:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2572bf44eb3080a4505d598be0acfdd5 SHA-1: fe2966789e677361612d48046c62458b51abd0a1 SHA-256: e05380d15757c78a8e60c141cb43719f6c55828b26be36dfee0f3a858a73f46b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://philabc.ru/uplcv?utm_term=piano+tiles+pro+apk PDF link annotation
    • https://airin.lv/images/userfiles/file/budewewemaga.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c0c6bab18---zokan.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/runuzotanowiwufel.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/zurabasat.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/3577069667.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/32857313525.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/73329340017.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/13396453133.pdfIn PDF document text
    • http://dominant.name/userfiles/file/92456662760.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c92feb72494574f9ecd91d28e05a2f6/guvosavuruwupuzito.pdfIn PDF document text
    • http://youil.org/userData/board/file/valowesusupasodovafu.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210903_063101.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/sarumabija.pdfIn PDF document text
    • https://goodline.by/userfiles/file/retufepirifudujogik.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/tofusaduxam.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xovoxilujexumamujazesi.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161430437c9369---nigijil.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/titoda.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/99429392110.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/73248611183.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/68055184455.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-09/images/files/3869779669.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/ramen.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/tozevixoxazegonisasi.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_off0000ce15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE15 19000 bytes
SHA-256: 82add02cf8ad35fc6ff190b57574d6d862eaf6431e86c5c678ec4b5b91a473af
font_01_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 10340 bytes
SHA-256: ffcae62f48d614b5797d89924e735dd5fb4d70f84536b1db3bd8ae531560efba
font_02_sfnt_off0001174a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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