Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f3d005b09d66eb…

MALICIOUS

PDF

79.0 KB Created: 2021-05-02 15:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dc6a8e0a6a7affffe8bab5769c6f733c SHA-1: c85c4155b2069613cf473c52a002523c9f96ec1f SHA-256: 96f3d005b09d66eb488f7b439375e7d1f0cb4115c62c4d1a9ec3b1c94545aef3
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 0.9996

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://resalured.ru/strik?utm_term=how+to+make+your+own+harry+potter+wand+without+hot+glue PDF link annotation
    • http://phrensy.co/247676437609do4l.pdfIn PDF document text
    • http://sportplays.ru/be_power_ease_pressure_washer_manual65f2k.pdfIn PDF document text
    • http://1fps.ru/terminator_1_imdb_parents_guidet5k3y.pdfIn PDF document text
    • http://vozobatenaw.mywebcommunity.org/determination_of_iodine_value_experiment.pdfIn PDF document text
    • http://greatmasters.biz/jabogon0qmsd.pdfIn PDF document text
    • http://safilow.iblogger.org/integration_of_x_square_cos_inverse_x_dx.pdfIn PDF document text
    • http://euroshopme.site/roper_refrigerator_leaking_water_insides8jme.pdfIn PDF document text
    • http://dejijesumewir.22web.org/orao_so_miguel_arcanjo_21_dias.pdfIn PDF document text
    • http://investmag.org/brio_deluxe_railway_set_manual4l4vn.pdfIn PDF document text
    • http://thedouche.xyz/inference_worksheets_with_answers4ikb3.pdfIn PDF document text
    • http://tinudikironuvak.22web.org/nafekonixibiba.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/19270891123.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/rexanutumewobijikozenasij.pdfIn PDF document text
    • http://dusuvoparujizoj.rf.gd/3552621351.pdfIn PDF document text
    • http://dexifuv.epizy.com/black_and_decker_cordless_trimmer_20v_manual.pdfIn PDF document text
    • http://suwiwozeko.rf.gd/freeze_spreadsheet_excel_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/facebook_photo_online_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/fimatukubige.pdfIn PDF document text
    • http://patafisowu.rf.gd/41193040201.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/kaworadonovedevexunugale.pdfIn PDF document text
    • http://ferurexage.epizy.com/7324751322.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/pdf_cabala_pratica.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_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 5412 bytes
SHA-256: 791b3eb1c9ba36b88558add485e4bdbe80999fdddf72d9fe72892146a7a88461
font_01_sfnt_off000109fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FE 10764 bytes
SHA-256: c0a4bb3ed6904c917c4ebf0db4b7d41f2c578908f5a81944cc63f20e2a0c94be

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