Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec1e9d4d459fce0…

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 13:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bf617979700768e85cb0fc8b12ab27e7 SHA-1: cd22803051c2e6ce12e87f1d4878aa90db639fdb SHA-256: 4ec1e9d4d459fce04af4c3eed3a5839446ce98dc0bed76078f00af7d8c038067
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sperrincaravans.com/images/file/18709281603.pdf In PDF document text
    • http://avtosfera28.ru/userfiles/file/gorefekivovatuliwi.pdfIn PDF document text
    • http://iknow.pl/files/file/xapolulav.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/femibixojusuj.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/48175581691.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zodumum.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/66025583856.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/81150325521.pdfIn PDF document text
    • https://jurad.eu/files/file/82578978906.pdfIn PDF document text
    • https://penzion-palice.cz/content/perevotijorodonan.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/difupizilomufuxojemet.pdfIn PDF document text
    • http://oris-am.com/editor_up/72901751384.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/niteratonukotig.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/koralamigilepem.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/41423403208.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/zafivumawogefomasorug.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/70254073265.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/74107315859.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/kikafomazanagaline.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/zulezep.pdfIn PDF document text
    • http://intertribo.sk/files/jipulenufuten.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/wazuvipu.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/55590880687.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/91479137828.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612edd529f228---79848890185.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/31070741912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=gta+5+apk+linkPDF 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_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 9988 bytes
SHA-256: c6938bd78689d45bc79d21661085945f15b06ed70a589bbf454d85117a445309
font_02_sfnt_off000108b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B6 17732 bytes
SHA-256: 40f3a6bfc49cdd4489dfdc71e9b4d62706c4018b40d485bf921d77e5a37079e9

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