Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ded3e6e7d0cd28c…

MALICIOUS

PDF

75.7 KB Created: 2021-03-22 10:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d95b543474365a76cb51f76421fa5eb SHA-1: 8e99b8c98c4b00d2001650d2ff83f427bf8deef4 SHA-256: 3ded3e6e7d0cd28c6c3beb007cb7106c7c7ca3b3f606573c922ba5cc262b302b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=pdf+to+audio+converter PDF link annotation
    • http://craftsmansmetics.com/3407027859lng2g.pdfIn PDF document text
    • https://nogalagamepet.weebly.com/uploads/1/3/0/7/130738620/kotakeg-ridizelikuke.pdfIn PDF document text
    • http://afracheat8.xyz/gimigaxiruvafapemuzu6sg8e.pdfIn PDF document text
    • http://rajudadude.mygamesonline.org/75786915754.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/2jgPjfT/merabetako.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/84791655013.pdfIn PDF document text
    • https://topemarepebide.weebly.com/uploads/1/3/4/3/134316461/6680696.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/asiehgb/constitucion_politica_de_guatemala_actualizado.pdfIn PDF document text
    • https://giduwuxudi.weebly.com/uploads/1/3/4/7/134716719/gifulov_lofimij_pebuvew_josalekebo.pdfIn PDF document text
    • http://infokurs.design/best_new_games_2019_androidf7qy3.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/hhicp9q/93413065038.pdfIn PDF document text
    • http://idealslimitaly.site/free_tax_invoice_template_australiazksc8.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/wave_motion_worksheet.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/bc2dc68a52fd7.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/fishing_gear_ratio_for_catfishaqkwp.pdfIn PDF document text
    • http://newsportstechnology.ru/types_of_reporting_in_journalisms3wx2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mifedisiso.atwebpages.com/lebojumija.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/dream_of_snake_biting_face.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 4868 bytes
SHA-256: dc60d98a3f05f22181500cfd3444160202b2103930adc3531dc2e2a6b919b85d
font_01_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 11200 bytes
SHA-256: caf4e320b970acf85b6d5fec37e04a55e076ff6d250f76e4aebb745b1cd1df08