Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d0c3bba356b467…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 05:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0e9d3538fa6bd1afd8cdf513c4d70263 SHA-1: fb711e9a496fc882653552b63e398658640cfbc1 SHA-256: f1d0c3bba356b46772f195f04fcc8ad6c5f6d6d8daa129f45a8790eef28338d7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with an action trigger, designed to trick users into clicking. The embedded URLs, such as http://gvs-russia.ru/admin/ckfinder/userfiles/files/20128010398.pdf, likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://gvs-russia.ru/admin/ckfinder/userfiles/files/20128010398.pdf In PDF document text
    • http://wellfoto.cz/pictures/files/55486777453.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/bewemisidotezodok.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/57946399420.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/89119722360.pdfIn PDF document text
    • http://candientushinko.com/images/file/zegunojowixe.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/pojusasagagex.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/65954669687.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140caa45707d---35847728599.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/gaxenolebebabego.pdfIn PDF document text
    • https://digiconelectronics.com/media/gutekunesatadito.pdfIn PDF document text
    • http://scarpatti.com/files/85179431176.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/bufisofufokuzese.pdfIn PDF document text
    • https://securitydm.net/slicice/file/lekapanimozatuxorifa.pdfIn PDF document text
    • https://webmanagement.produse-electrice.ro/images/file/febegaperati.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/bomutikezakap.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/zebopezobirikisilibubire.pdfIn PDF document text
    • http://vce34.ru/attachments/file/33063159145.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/62368243789.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/zisalunabilukawarili.pdfIn PDF document text
    • https://wita.lt/images/files/43303487898.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=gauraiya+2015+full+movie+watch+onlinePDF 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_off0000aef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC709 11264 bytes
SHA-256: 7fb455c2d1532b9763c7c2ad88b16de8723ceb3a2448946d78dbf49db6aa644d
font_02_sfnt_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 14224 bytes
SHA-256: 5e9f77238304071e6095b759a03afab8d5aa7e6eb9d262f9b4912b3ca6f782ee

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