Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65e760cf4404dc3…

MALICIOUS

PDF

76.5 KB Created: 2021-09-07 01:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 92e28efad802ab9c2c12b5efc020166f SHA-1: 832ca4346177a02546fbb795518069570e7ad071 SHA-256: d65e760cf4404dc39d1a917ac589c5e3b9e5fc95f580995d61e1c375c42db25c
156 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous URLs pointing to link farms hosted on compromised CMS uploads and disposable domains. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://beiwendq.com/userfiles/file/34921873066.pdf In PDF document text
    • https://afayl.com/userfiles/file/4736560275.pdfIn PDF document text
    • https://alyansdugunsalonu.com/userfiles/files/sirepivuriza.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/nojipebixegufenifoka.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/gaditewevotojasubu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f88b623dfa4ab5e33a7e131f90ac25b9/xisutukazisafidip.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/2bc9c011aab8dff9ed457dcbe3bfe403/47401100453.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a3f21f2ad1d358652318b92820aca3d0/83394927354.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/33649029452.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/49027351995.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/29872510925.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/82286537074.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/pivigemiwivizowojip.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/nibozijapojoxujiwadexinog.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/15733275772.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/pefidonegibiduworunabil.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/d9542d41a3d58d9cab188ce4abdf24f3/kukatajep.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bof97cg16cf7du5s0626remmj6/togovesefevijepeveziz.pdfIn PDF document text
    • https://euchebnici.com/img/file/16026170134.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/e37f3c9ba2f88124c03223530a6386f4/69228530326.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/66628751140.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/logenasobegipefafebumitiw.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/29216222086.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/gixanaguxalogiwupo.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc143a6a45e---finejulaxiwegixej.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/82410496752.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=guillaume+musso+pdf+francaisPDF 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_off0000c39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39A 19004 bytes
SHA-256: 0ec1920458babdad7ba84e00acc0ce3fd684e138e07fc2c2c42c2e6cd829af09
font_01_sfnt_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B85 10820 bytes
SHA-256: 8ead2468f26d6e0aaecfae24f91796499a1dc511e07c891b00f071f83911059b

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