Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4eafdf7823da3f…

MALICIOUS

PDF

84.5 KB Created: 2021-09-05 02:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 96b1eed69c5d0f39f2ccce240fa7679b SHA-1: 7cc4d8b3be8b8938d9f2bf2da3a201157a3f74a8 SHA-256: 1e4eafdf7823da3f7b40e51abf142be55726867a34e41f49eb9db89d970ae81e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of multiple external links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083332157186---68168671616.pdf In PDF document text
    • https://kindeeyudee.com/ck_files/files/nazasimijebap.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609239bcc0438---badadejewatepol.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/15617250485.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4ne0c1q8dglsfao8o350hdh9t0/82554587822.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/jovojato.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608833f8cd24b---65590333817.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/zuvijenivezuzibo.pdfIn PDF document text
    • http://vangphugia.com/userfiles/file/59189920482.pdfIn PDF document text
    • http://dakmet.pl/upload/95911669646.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa77a66db---fizosugulibimogar.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/sasis.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/74710482060.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/88870161053.pdfIn PDF document text
    • https://cowik.pl/upload/dawolupisesutevadeda.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/59121837254.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0ef23534e---50741876587.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/molewinetuxaf.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/e19af56b32fd63afcdbb23f02c462279/14609984278.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/21101ccf249859514525ed9291bae86c/5907929445.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098392a65944---pixitesiladulotuxagitifa.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c5842a038d94dc22756e62f0d3f695c2/47493519248.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/1fa6bbd7e9709d63d2823344c2c076bd/finujutazajijit.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/petejesilopivowido.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/bc606bu6s7lt52tottm1074qj0/47001677550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=psoas+stretch+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_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 20192 bytes
SHA-256: 58e85a8fb52b07d1df836956c4d1aa1674e23a44a6cc30f88d1bd06d13eb7a86
font_01_sfnt_off0001145c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145C 10476 bytes
SHA-256: dd6797b67f77ac6847398c03174948e5da86c6f226db29cb3c907372ed4170ca
font_02_sfnt_off00012c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1