Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af698a809e3cddf…

MALICIOUS

PDF

83.9 KB Created: 2021-03-27 11:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 32911519b6528ee19f6266c4715d9a17 SHA-1: ca92f3c452e0b61a69c6bb595565b0a8e855d44f SHA-256: 7af698a809e3cddf308d13560adf17c0a1eb2b76094781fe84c995f8f513bd54
136 Risk Score

Malware Insights

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

The PDF file contains an external URI and an image lure that redirects to a URL associated with phishing. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the redirection mechanism strongly suggest a phishing attack aimed at tricking users into visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/award?keyword=revis%25C3%25A3o+bibliogr%25C3%25A1fica+o+que+%25C3%25A9+pdf PDF link annotation
    • http://pifofobexaxel.mypressonline.com/aplikasi_caring_dalam_keperawatan.pdfIn PDF document text
    • http://dalkomis.website/twilight_saga_eclipse_2010_full_movie_in_hindi_downloadye81e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5fd6ccff6e4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_5fd8bdd810c7e.pdfIn PDF document text
    • http://smallita.space/craftsman_truck_tool_box_accessoriestpqyq.pdfIn PDF document text
    • http://frankiearvelo.com/skylanders_swap_force_starter_packlm7ew.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/bipirigatowajaletuwidubuj.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/lasufalinugifalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449769/normal_600985e984ebe.pdfIn PDF document text
    • http://nutristrike-shop.ru/gonimuxudonnd9at.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/72098430823.pdfIn PDF document text
    • http://topcreditscore.info/im_westen_nichts_neues_film_20057tgt2.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/70344442931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495241/normal_5fefceb49086a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/38871175558.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/xevivenef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c143c9c-74dd-48e8-86e1-e3d4b4c73aa2/4049980441.pdfIn PDF document text
    • http://jokosen.atwebpages.com/11560769858.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/carte_du_monde_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc9f8e1-91c4-47a3-9b17-fd1e879b361b/stannah_stair_lift_installation_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fbac9e4-9ec6-42cd-bd52-78db83935084/football_training_with_cones.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/east_aurora_school_district_131_report_card.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/abacus_maths_year_5_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/best_platform_games_2018_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 6048 bytes
SHA-256: ee399e16aca8758834579844407da3c398a18326a31bb9ea05e243ff8d86bc82
font_01_sfnt_off00010b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7C 12408 bytes
SHA-256: f62136973ef9f694cdaf4e876fb9903d9fe920313918ee583ff6a1d0322a209b
font_02_sfnt_off0001314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176