Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3c7e290ab02fe1…

MALICIOUS

PDF

91.7 KB Created: 2021-08-11 08:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b0413415e3d6021dcd946c9304d888cc SHA-1: ea5823e4d078170f80ed868b36fafd264310e8c8 SHA-256: 4e3c7e290ab02fe15a6b1ab9b743c7cc4a3a1d28ee45934a1b2426b579d70a87
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 to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific intent beyond directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://heorungminhphat.com/luutru/files/74971825193.pdf In PDF document text
    • http://architettodrabeni.it/userfiles/files/60543854185.pdfIn PDF document text
    • https://nadamasristorante.it/file/83275113723.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/28021941760.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce547e40fe---fikudat.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/33402789708.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/wibir.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/sbcad86g5jtq6uch6gfbbt8tb3/zugupugov.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1348ea9008---xukomobus.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/16662649751.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5ffb0c3b930add2754e3b2a4d558c505/pufelijiwuzoxoletifezase.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/89203866521.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/8db244a0004f6319ec86d7b2644a1f76/bopemep.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/95200071663.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/weforobamagutowezenuzow.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a58eead096a---namuvuwagume.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609fece3e0078---78318918564.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/pisumojaguruxudikalul.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609663d945ed6---lozijipavel.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077365a7c685---lugulopajopofifonen.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b187821faa6---vifinovunugefapusixovola.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d974e356fcb---wivusoponixidalin.pdfIn PDF document text
    • http://ekotronic.eu/files/file/95607641234.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=can+you+turn+off+beep+on+cuisinart+coffee+makerPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8c68598de0c494286a37555de363731c/96598026347.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_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 17368 bytes
SHA-256: f4856d20ef1b151fbc4dd0378b3a588440ceff475716a73d822e659dd1c3ad17
font_01_sfnt_off00012e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E41 11072 bytes
SHA-256: 2c82c45b10fd9775437860f676b532886aedfe709f84667d5d2bb94a2421c3f2
font_02_sfnt_off000147f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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