Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce4595c8c343de5…

MALICIOUS

PDF

75.5 KB Created: 2021-09-17 20:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: adbaea6def3a4bf503df5dc0495a46af SHA-1: 07c205abecc2dd93cca222757550c52575345415 SHA-256: fce4595c8c343de5f04dcc87c8059ec0e5e3702131a922972d0e3b157f5a5e00
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URLs, many pointing to disposable hosting and using UTM parameters, strongly suggests a phishing or content-luring campaign. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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=station+square+medical+centre PDF link annotation
    • https://100tmt.com/uploadimage/files/20210905055616.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/subeka.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/wezojikanejufaribonela.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/dowutozawu.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/83722340765.pdfIn PDF document text
    • https://ratodua.com/contents/files/pogizuxetaxu.pdfIn PDF document text
    • https://csodamalom.hu/files/files/zoxulepesilurikepikabez.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/21555637194.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/12996741304.pdfIn PDF document text
    • http://ganteltechnology.com/system/userfiles/file/rebivusa.pdfIn PDF document text
    • http://gapp.fr/medias/files/mutagomododafabomakudi.pdfIn PDF document text
    • https://andrejc.si/files/file/safojobimi.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/zanuvujinozesexejokixu.pdfIn PDF document text
    • https://qigoodteam.com/uploads/files/202109020135019497.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/d39cc1c942c755da2b870a30ffaa3f8d/32473253602.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/vajap.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/xetomuxufeginamojekiteki.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/77423957545.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210908012324.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/rivikis.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/77650133635.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109101001288100.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210911225752.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/33470610950.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_off0000c6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 15820 bytes
SHA-256: 53e9eefde1f5a8fa46cd25289edc62118cb9a29b93432e8405be2fda7d0190be
font_01_sfnt_off0000ef4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4E 10852 bytes
SHA-256: ed27c012b7665849ab16f6d550c09a377f75443e1cd0c2577d98be1941b0d7a7
font_02_sfnt_off0001081d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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