Malicious PDF — malware analysis report

Static analysis result for SHA-256 48daf1657a606312…

MALICIOUS

PDF

86.3 KB Created: 2021-07-19 12:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e4a8345be16876c9185207918b7c03e4 SHA-1: e6489c16a990884410b0fccf9b7484990246d2a8 SHA-256: 48daf1657a606312595efb229cab1e9a266bcf11bfcaa65a57c473078706d594
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical finding for 'Recovery secret / private key request', indicating a phishing or social engineering attempt. The document contains numerous links to potentially compromised or disposable hosting sites, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures that aim to trick users into divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/ea88891b3ea6b374e8758806b713a51b/22870685926.pdf In PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/lopenudotif.pdfIn PDF document text
    • http://hasyo.net/files/file/89342934039.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/80334146576.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2c5992618---kofulatawoba.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/e3201f9c9435a635d0c79faba0516eb2/refivepirukokaxem.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16081ffb47d4d6---82331374916.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/pinabunasegi.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/2c125c9c7fef01cd96829ae6e91e61bb/23981682038.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b36cad708be---54433922595.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/265e7d0e118a69ec138af46955d8bafd/37450665075.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2a3699755---23967679674.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/40241831070.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/kerozu.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/35168726740.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/85056432490.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/52e638ae1508c00557070e078bb2c6f2/pejogekuweje.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/nejus.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/64871214695.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/07cf10e67ffda4ac7b880483ad9f62b4/42132739169.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dccf1cec041---3650454073.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/zodoruxanirimulosiro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=download+pdf+converter+professional+freePDF 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_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 10768 bytes
SHA-256: 1b87c05bba9c494f94090b62791f70dd3d7147ae57252b567700b950c49356e5
font_01_sfnt_off00010778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10778 16984 bytes
SHA-256: dab2505e79871f499fc8788dd92c30e7efd3a09177c6dc4e2e8e90a6b6a02310
font_02_sfnt_off000133d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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