Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b9951d086ae692…

MALICIOUS

PDF

73.2 KB Created: 2021-09-03 22:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a686d256c5bf050f89fe9c94f052a3e7 SHA-1: 89939dbb0fc450d8694d3e65d886af9fb1ade350 SHA-256: d9b9951d086ae692cc0fded39b52ccad37c9d2dd21367b9000bdd3e5a7d7e057
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a password-protected archive lure. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to host or distribute malicious content. The primary purpose appears to be tricking users into downloading a password-protected archive, which likely contains a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089abb694a4d---33888052542.pdf In PDF document text
    • http://karpatskiles.ru/store/files/javosodufuwupax.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cf67782cd---libijalejogapegusam.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/ruzefobetatus.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/33201034292.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/gojutifanimokak.pdfIn PDF document text
    • http://terminsk.by/pics/files/savok.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b7c792599d65705ae31108400954be83/78610021485.pdfIn PDF document text
    • https://alutat.com/data/file/27061189363.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/da569b71094d83828a15ca1e012d141e/faxolijadopolazejuvuro.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16116156861ecb---6688175312.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/67681111444.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/2012395399.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/werexuj.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/44558077040.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/58b6cb2bf963545cf30ee0f191852789/tujefidedewemetol.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/09aec8a2009f25c38894bc344d3e80de/39523451726.pdfIn PDF document text
    • http://ruihuitax.com/files/file/xibofisadewulepabofamag.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/97ho85kldfvsnqp7hm2a2u072a/dokidizeriziju.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd6e75fd2b---61471323816.pdfIn PDF document text
    • https://tranthachcaodanang.com/uploads/image/files/81545292578.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=quimica+analitica+cualitativa+burriel+marti+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e47993e7d2---23704315193.pdfIn PDF document text
    • 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_off0000bc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC15 16468 bytes
SHA-256: 55d746094f6ef7295e33cf4de381b7fd91c7900a25745e688728b17938811f18
font_01_sfnt_off0000e58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 10860 bytes
SHA-256: 97670618b70133af74eeb3696ec661d7b1e662f7c65795072cd2dd6d7fea2f60

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