Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e6531e9e40d28c…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 12:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0e84bd0cc12641ab449a85d6cc03a656 SHA-1: 0dac9463e6b89006d2c111d790dc2cb6fc74af52 SHA-256: e6e6531e9e40d28ceaa688d80bf12abf7cefd238d7d94e3c77cf41b0eb69ce00
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves luring users to download further malicious PDFs through these links, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://sklepbonus.eu/userfiles/file/podefitasokarerenog.pdf In PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/tezutamod.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/42959749949.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/88554687993.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/25022342223.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ua44214a8cf79q08lch62dnhk6/negipujitexozuxolosekaj.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/541758af9b5eac7f0cb47561119fa3c8/kanitaseparit.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/gibadukebeloro.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202108262203564855.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31684387cc---96900755750.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16105655be2986---15103463937.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e0d82ffb6---pemapokelejiluwufagux.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/85b91a041ae4efb874b9386b0d6582c6/98344434112.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/5743771580.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608510b60da64---zegotizisotok.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///roxedemakonega.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4c3f2dcea---bivogeveziwe.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082f0c66f97d---51192892730.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/92159016730.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/15249045114.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/dd78e024ee0b08e3dfc2bc8208916ef5/62339218532.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/86625271922.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102c3cbc54cc---4551886250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=demographic+indicators+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_off0000d7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A0 11024 bytes
SHA-256: 3eeb7c032fb25d1e1b645505b5eb948b0c935ea1f8001baf8ed3409dbfb6492c
font_01_sfnt_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 17500 bytes
SHA-256: a5c87bfccbab4f321369cfcb4cb094584a54d0813ec30ecd448de8df3ec6d537
font_02_sfnt_off00011e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.