Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea9ab85fa1e0405…

MALICIOUS

PDF

97.0 KB Created: 2021-09-05 09:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e74f5d9b6503702c7efcc9072d269cb SHA-1: f47c91e03e5d6844f89cbb4e359ae022a1cecbd3 SHA-256: fea9ab85fa1e04050ca95975c65f5fc029e54fbbe05017bcb6d7381690d89054
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document attempts to trick users into calling a phone number, consistent with callback phishing or tech-support scams. The presence of numerous links to potentially compromised or disposable hosting sites further supports a malicious intent, likely to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

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.
  • 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.
  • 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://burfel.ru/upfiles/files/28262497746.pdf In PDF document text
    • https://dichocungtoi.com/userfiles/file/46500546426.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/t4corohcd32lf7fa6ctr0nct51/11415773341.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/xinakixirurobag.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c290dd4a647---jekeji.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/13575948130.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/mamelifep.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/vosujoxipepezejodoxej.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/95120476118.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/lakogerilabiv.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/34339191644.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/worixasaxetixolafafopodi.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/fc2621716a5d86ba10d6c1ed121536d3/64620428037.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e968bbd67a---41237510073.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/37137638962.pdfIn PDF document text
    • http://starlightcelebrates.org/clients/4/43/43e9139217482d7666ce300faf566241/File/23987070388.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ee8qcbiso36g9a1bq03v2itft3/67594673579.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/49495886368.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adb2a0b55f---18329414519.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/12269557443.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/80362869775.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/80243859867.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a1305cfe2fba04881f04656fc4e746a2/vijajisan.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210831_184719.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/26286827761.pdfIn PDF document text
    • http://zjpjxt.cn/upload/uploadfile/file/29600077934.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/23028357752.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/2kibo8chvb9bqv8cetva36p7pn/22400702907.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=asme+b16.5+flange+pdfPDF 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_off000112a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABF 10972 bytes
SHA-256: 60543ea798247a59303c382f6a05c54eb7d32e93921e1d820c1791f8fd681892
font_02_sfnt_off000143e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E7 18908 bytes
SHA-256: 96128000ec6e0ddbb071b42481eba02929f0f3d61e83801aeccc9d9461b881a9

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