Malicious PDF — malware analysis report

Static analysis result for SHA-256 3429db1053ed1da1…

MALICIOUS

PDF

81.8 KB Created: 2021-08-17 10:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f62b5977751bac3c12bd262fc4695d07 SHA-1: 47b8271abfed23b18c85a3542a3719a92ac2a58d SHA-256: 3429db1053ed1da1cab0ebb373b64a2e33d83ed55751eb787c935660dc56578f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing attempt. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/darefosolekov.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5c2c5d85aa3e3ae4a7539660317422b0/gopinevenunelo.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/81142495061.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/d6e06b6b3e9aa437a108bcd29e95463a/37237236327.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/68207374d5e19fa56f8bc1a3344cea5e/99212693324.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/mavikenegusoxut.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/27075579145.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/96843037274.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/49744702153.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c730ea984bd---bugololumobudanamu.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160850053b20a1---gugozujugojanarij.pdfIn PDF document text
    • http://www.zima.snowcat.pl/admin/ckfinder/userfiles/files/lojisinawujiviviwu.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/96232228199.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/vadefulonozutegej.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/nonolutojogedofi.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/24677387446.pdfIn PDF document text
    • https://medicula.pl/web/uploads/files/wixavivobavesubixopefof.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/66038905819.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210802181037.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/2b1accb310e736cbc14e6abff696458a/redipinikibu.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16080c1c09d9de---dipadudezi.pdfIn PDF document text
    • http://agro-partner.com/Image/files/niperubovoxufuxapukivusev.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/47de04a3051edf1afb690aeca02fb930/4479422619.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/4523010093.pdfIn PDF document text
    • http://poledance-chrudim.cz/files/file/6085548130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=global+competitiveness+index+2019+egyptPDF 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_off0000d8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 11680 bytes
SHA-256: bf7085a10c5ce7fa480cc998e7927a7004ffa6f6358bb27c527e6975d46bfa31
font_02_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 17244 bytes
SHA-256: f04b4ea4e4838c41dfc3d1702be120be263dcba3a94898c92a2a189cfef748d1