Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d549cd99c66739f…

MALICIOUS

PDF

77.2 KB Created: 2021-03-11 00:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ee576e00a88d0cdd737ad134e534c1d5 SHA-1: b8438c4825dc207d0499833c347ba72fa3789b58 SHA-256: 4d549cd99c66739f3b05c50e8f47785a0b30bac81f1e49485067b9e95a3bf067
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=imdb+league+of+extraordinary+gentlemen+parents+guide PDF link annotation
    • https://zudomizat.weebly.com/uploads/1/3/5/3/135308615/mixubej_kumaj_pulajixamulusu_pizazuto.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/6327114.pdfIn PDF document text
    • https://gidepezugubuwo.weebly.com/uploads/1/3/4/7/134766768/1942594.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/zejiziver.pdfIn PDF document text
    • https://cdn.sqhk.co/vazaradigif/jcm2Khx/ayyappan_video_songs_tamil_mp4.pdfIn PDF document text
    • https://jitipukojid.weebly.com/uploads/1/3/4/7/134707402/c57286c4b1d.pdfIn PDF document text
    • https://veraxoli.weebly.com/uploads/1/3/4/0/134040716/905492.pdfIn PDF document text
    • http://kivedunorujuw.66ghz.com/honeywell_tb8220u1003_unlock_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/muxuzoxipopa/chcgjjh/wifanuladejimulasavam.pdfIn PDF document text
    • http://jawirigagoboni.iblogger.org/bewet.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/divina_comedia_resumen_por_cantos_paraiso.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/hiavhbM/stay_alive_game.pdfIn PDF document text
    • https://vatanivirasuta.weebly.com/uploads/1/3/5/3/135387760/kojusisalukeraxuroli.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/gm_diet_plan_weight_loss_stories.pdfIn PDF document text
    • http://lanafobigowo.22web.org/xalur.pdfIn PDF document text
    • https://vajojesorenum.weebly.com/uploads/1/3/0/9/130969616/tazuzixebibago.pdfIn PDF document text
    • https://musejeruz.weebly.com/uploads/1/3/4/7/134740211/burukemoxesi-vatotofa-xuzurit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xatowumo.epizy.com/cotton_bed_sheets_on_sale_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/ammi_ammi_telugu_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/blender_dope_sheet_action_editor.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_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 5608 bytes
SHA-256: 93298998fdab68c522d5914b01a16080f16382f1f9d9e72ce6eba7ca965f25a4
font_01_sfnt_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 11244 bytes
SHA-256: 835e826410e7338042725cacaec3d7791a5ea9d30b6477f28a3ec1cccba4077f

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