Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fd2b4276a4bfbe…

MALICIOUS

PDF

105.4 KB Created: 2021-06-29 20:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 11bb06d4466507c71769bb03c72767b0 SHA-1: 07d947c08485bb51e1b912f213663049ac4922e3 SHA-256: e5fd2b4276a4bfbe2b02878ffd8f0b0f8f4cc6f0c331a07d7f81a066620c4a78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing or trojan variant. It contains numerous links pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of external URIs and link farms on disposable hosting further supports a malicious intent, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/b2968639e3c3075dba7a7a2601f565c7/bajominakafet.pdf In PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1608450473d97a---41001414269.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160bdbe9d84cc2---mizevureratebazunazij.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/9cac12c2280fd911a76ec08099ed6e19/molamufakewijiviwuw.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/53209538543.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0f86b1d0ee017d78ba4cd3d7b2f4d117/7575294345.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/50e4e6c56c579487b00412fe9ba2c50e/25634299290.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/930043a56e8b43e90fdf943df7eb219e/80418301394.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/7a8c610c801296b864120f6a920ee245/46233585439.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/f9mslrciru7jtkpt9ts3g5ifph/gokojemuvopurowiwufesug.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/67668727885.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad84fd74c43---93046051623.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073e2651da0f---tewux.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/domokuzo.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/393h08bqg4mm02sfc9rf870agg/10931706003.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a97ec05fb6a725aa8dbf60b28d1164e8/41853346818.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b05edb8fd8f---lotefebederinodesesu.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/rotonimixufilon.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f576d6f78---gonurixegatumukobunoben.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/sudilawavefetipidikiti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pastor+rc+sproulPDF 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_off00013902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13902 18132 bytes
SHA-256: 30bb7bf2fe1d3f53d8435c9fb74ac95ac96bfc02521907ae94c1bd74bb66fc80
font_01_sfnt_off00016877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16877 10140 bytes
SHA-256: a70e0c861e5fbae5086cbb84f369af437cda386f39a675e5a97ac328ad7f3b31
font_02_sfnt_off00017f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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