Malicious PDF — malware analysis report

Static analysis result for SHA-256 571dbd579f44a2f0…

MALICIOUS

PDF

99.0 KB Created: 2021-07-24 11:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 64d89001c600a3f3dfa6b036f2ac1cb5 SHA-1: 12cd0c10dc84d3ec92a2d97e81937dd3f5e7aef2 SHA-256: 571dbd579f44a2f01d8881fc420a86715012b29de42c196acf1e60fde80910f3
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The document's structure and embedded links align with common business email compromise tactics designed to trick recipients into altering payment details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/66cd4bf6385eb2336c13b795c0d15b2c/77486441077.pdf In PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210715165326.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tqvk15c7eakahtihej5hkf25q0/66352439981.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/729lpf8mcgs0bk0ob151lut833/gulirejuxuzaj.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/pakubokilebepupolug.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080f510cb913---rowapolikagejofifakepus.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a5c70a22cf42345e74de011e56e652bd/23371098823.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/zonovufesupizi.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7dc0d5e49e8e268c78c091791b814dcb/59424704235.pdfIn PDF document text
    • https://ksuskalology.com/images/file/jixemomabewiniwok.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/nizuxaz.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/kosiwodozazurojasa.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160791a54baf59---31782021944.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab36261d2ca---73521090573.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083b11382173---2678345575.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/cah4npcomel6er7mgb8ac3b8u0/moxesafagux.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/9342521976.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/99283982771.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210528061334.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/zadagetumiwibofexeladib.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/9741a8cefdaa5510ba274c8a3f2a6efa/80418213487.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/jizolireninavafufizikonos.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087374ae56be---82104859758.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+get+followers+on+instagram+fast+appPDF 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_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 10776 bytes
SHA-256: 03c86e24ea178ff19c5c49089e249ed1620fb71dbd6cb4307096f7b8e63953fd
font_01_sfnt_off000137d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FE2 17208 bytes
SHA-256: 50d7da5e137b41a6bf476ae9f929615df6540ecce1d2616a5cdf86c695eed60b

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