Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e6287db284807b…

MALICIOUS

PDF

85.4 KB Created: 2021-09-03 18:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 289b7e55c08936ea2e746bd26dcf7e47 SHA-1: 9894621f2420d7520672938295bbded6db0bb3d8 SHA-256: f5e6287db284807badae797f53aef00f5a8974f42574c45885f84f27b5e6a068
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL findings point to a malicious document designed to lure users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baominhlabors.com/upload/files/97612875382.pdf In PDF document text
    • http://straps.by/ckfinder/userfiles/files/kevebug.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/basotixowunilateselu.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/xemufiluvezovij.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f7c4949a---12140896808.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2e6b2f1a8---lavupu.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/67344304020.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/20730022097.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/16332963603.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/83566853437.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/32350233527.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/88252721996.pdfIn PDF document text
    • https://argumentua.com/i/file/netegarajepixafo.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4b8c4bf9b---birege.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/84ddc1dc98ee6074dc50bbf10523cfef/48566360514.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/nunog.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/lipufapotenotituw.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae06481b9a6---vepujigilapewedujedozi.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/xasogur.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/98987383920.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd043abb5a---95038783653.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/93271637382.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076e11228947---5416739687.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/44327742307.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/8605eaecafda54e1b6fc81d76e801fc5/45134345822.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=3d+pdf+maker+for+autocad+crackPDF 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_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 20616 bytes
SHA-256: 445cd7ecfdba9fc78d34c02312fa9a496e793357e1fed34a61093b5804d3f66b
font_02_sfnt_off00012d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5F 10636 bytes
SHA-256: 08eeadbf39e5918df4d88056093ec93e7f872323bae43394167e48e65a3c7b05