Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e438c81f3fa5db5…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 14:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ddeb546fa1a0b76ec2e03903b058b018 SHA-1: 3171dadb21002dfce5c09784129baa5682adcd51 SHA-256: 1e438c81f3fa5db5df2720ede877da02e498a7d779b1d29e0f4ea0e19faf30d2
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URLs, many of which point to compromised WordPress sites or disposable hosting, indicative of a phishing or scam campaign. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to defraud the user through a fake lottery or parcel delivery scheme. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://epoxidice.ro/mm/file/93233802725.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bc9cannlgkalsfmaejlvf7e2h2/kefof.pdfIn PDF document text
    • http://camonetinternational.com/files/file/48243397796.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/9c0523db2cee7dfc42513d1ce83fbab5/fumakoxalugat.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/47440771936.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/70306323131.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c3786dc7b25---wolukagadasisoxanat.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/63806849453.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/24439280204.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wurijero.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/1358829539.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/73359445542.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/memapudinifejifubev.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/podifiwovidij.pdfIn PDF document text
    • http://atomleasing.ru/media/File/nabowaruru.pdfIn PDF document text
    • http://wsm.hk/images/files/70041418662.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/suwuze.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9e5224dd9---94235386632.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/murokutalovemiguxipel.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086c411c686d---75216216583.pdfIn PDF document text
    • http://zzquansu.cn/d/files/bujobowaf.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f9432fe9e---30725508181.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b75d1173b54---46142219039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=can+i+mobile+deposit+a+third+party+checkPDF 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_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 18324 bytes
SHA-256: 659ebc2101be9802c287d813f516a0ce20ed0c2c41a33c52f53c7433e7cf6500
font_01_sfnt_off00011b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13390 11156 bytes
SHA-256: d804e84dbde360e4c384a66d78061be4b26154305f05f06eafccdeed768ef19a

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