Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2eac2911f65226f…

MALICIOUS

PDF

80.8 KB Created: 2021-09-13 10:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c47530641f241d5f1fd0bc60578b6292 SHA-1: 0904dafabcb2d0bb5ad23cd608964cc493290401 SHA-256: e2eac2911f65226f6dee3aa4dd9fc519c2d97dda44217f0b3760f21c107ac975
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that function as a link farm, directing users to various PDF files hosted on different domains, likely for distributing malware or phishing content. The authoring application 'wkhtmltopdf' and the presence of embedded URLs suggest a deliberate attempt to create a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://chcial.ru/uplcv?utm_term=gta+sa+mod+gta+v+apk+data PDF link annotation
    • http://sportingclubalbinia.eu/userfiles/files/tovumefugobinatupatuw.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/penumiliparejepepigimede.pdfIn PDF document text
    • https://umartravel.com/files/74458874200.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/pupekufidano.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/duzogoxigoredujoxirep.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/82358623303.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/52044261972.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/16041041694.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210912033540501.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/pejomajeg.pdfIn PDF document text
    • https://karpataljaturizmus.hu/upload/gujadib.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/19734664573.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/xuwimizolow.pdfIn PDF document text
    • https://aokman-drive.com/d/files/66303673916.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210907/file/16309471175775.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/32136839610.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139cbb5d9075---91373263505.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/jamililurupinanolefi.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/sedor.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210904033047730.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/87888979562.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/92495832598.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/35tnb1plk56938n52s7tsco1e0/mezozumusaxupizisabezuba.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/pavexisivatilef.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/79390825936.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/wefogonoju.pdfIn PDF document text
    • 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_off0000d6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 10456 bytes
SHA-256: bb5e8868ed88aa98c67fa0be4e8aeea8dbfa6152a38400d1d115ee6e6dc43078
font_01_sfnt_off0000ee5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001066f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066F 18192 bytes
SHA-256: de1b0563a5c69577c30f1bd31070b9ba5e39a79029089af509e9e6f508b3d6c1