Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47662856e59984d…

MALICIOUS

PDF

80.4 KB Created: 2021-09-29 14:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c257c22ca710dd590f671daaf5c02240 SHA-1: 37455f2ac9042c2427de9a0e03311759bb783990 SHA-256: d47662856e59984d9e9fd59913d4d18f89cafb56342c0e5ecb9925df4e79f3ba
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a large number of external URIs, many of which point to compromised or disposable hosting. The heuristic 'SE_CALLBACK_LURE' indicates the document likely attempts to trick the user into calling a phone number, a common tactic in phishing and tech-support scams. The embedded JavaScript and numerous links suggest an attempt to download further malicious content or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://ketchas.ru/uplcv?utm_term=aplikasi+edit+gambar+dan+tulisan+di+laptop PDF link annotation
    • http://jwconsult2005.com/file_media/file_image/file/migixasilipi.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021091906453898.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/puborowumaxinuko.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/47719511488.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/nbc5s7pn5q1bieeka3ik013ptk/44385681495.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614fe658d104f---57147871120.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/sagavil.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/juletatusazitivokobumoni.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161417a69bcce5---kitapasikoguwumarefag.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/36262584006.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/nanas.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/22554762136.pdfIn PDF document text
    • http://ubest.ru/images/file/34650697135.pdfIn PDF document text
    • http://sichera.eu/userfiles/files/72341043314.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/tesatidurabe.pdfIn PDF document text
    • http://kgmda.com/upload/files/62752011306.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/kuzodup.pdfIn PDF document text
    • https://dintek.eu/uploads/file/bexazifagalebadasubad.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/ligojuwumepukitirufugakap.pdfIn PDF document text
    • http://chipgene.com/image/files/20210903_081004.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/72008929939.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/wajodofinabibevabadinajep.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/topifiburalujo.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/zopusejamejowe.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/63573135671.pdfIn PDF document text
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/11648748584.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_off0000d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 16600 bytes
SHA-256: 7fd2dee4742345f6f5dbc1f9f343e2a44977160d2865b916465618fafe2dd4b0
font_02_sfnt_off00011a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3A 11048 bytes
SHA-256: b95aa8ee59d5e2f3e7a2da6bfa28504fc0c20f1ea06810b46a6d815c828c1ad0

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