Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6716c3f76d3903…

MALICIOUS

PDF

84.2 KB Created: 2021-09-13 09:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6e31200d5169d6359e3ef32699d0c2de SHA-1: 51249e16771f95eaf33ba290011e02824847b4d4 SHA-256: 9e6716c3f76d390335003e5277b509b5c352659d562d30b7c156fcc55006aae7
216 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its high ML score and ClamAV detection, indicating it's a phishing or trojan. The heuristics reveal it functions as a link farm and a payment redirection lure, attempting to trick users into changing payment details. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to compromised websites to facilitate fraudulent transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://aokunoil.com/ckfinder/userfiles/files/nuxusojapetumawaxige.pdf In PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613dda391ba2b---86522769033.pdfIn PDF document text
    • http://asvpp.fr/pdf/fawowazetuvotaseru.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/59197901068.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/63392256827.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134877951e3a---65716428815.pdfIn PDF document text
    • https://ka-base.no/images_content/file/peluzikodav.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/zokawuk.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/gusikuxisakoxetajalubedok.pdfIn PDF document text
    • http://jainfarms.com/uploads/boxufazabexajibapetajefot.pdfIn PDF document text
    • http://domuran.pl/files/file/dalemoru.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16133d131201dc---bapupagilesutimeronexepaf.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/kigejoxofobu.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/51360466441.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/1111a07faaf6f3f8148582e80f723f33/10373150516.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/tixutawasigekalona.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/1884265435.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/vurara.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/lizodisuxowisamepez.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/votokafenitupevujexe.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/66878731f281de90aaf97d447762ed11/vifojipumipari.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/346707296.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/96573115141.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/d42fa9fd5fa81f2be386db89631c7272/71120535465.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/7420307788.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+transfer+contacts+one+phone+to+anotherPDF 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_off0000e551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE551 17748 bytes
SHA-256: 74218b39dfb10c86bc57f512aa0dd82c2de65cefac7353bbde96e86ed69a05da
font_01_sfnt_off0001130e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 10516 bytes
SHA-256: 9027cf30c5e31edb666413bd27b540ac53bc961bbbcb2e847735e98d14de697a

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