Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ac7ad367870c34…

MALICIOUS

PDF

68.0 KB Created: 2021-02-15 02:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8b03a09757815e3bab5ff1228c2f0c08 SHA-1: edd0e747ba4d43fc6e104ef3cfca53a811cd411c SHA-256: 66ac7ad367870c341c6fb7204c5d2fc32f6eab133b9e662f8c1b908cb8286aea
196 Risk Score

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.
  • 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://druttle.ru/wix?keyword=rudolph+the+red+nosed+reindeer+pajamas+target PDF link annotation
    • https://cdn.sqhk.co/tenokesime/Ujj6Kss/zupanelad.pdfIn PDF document text
    • https://voxaxaloxedifuz.weebly.com/uploads/1/3/5/3/135399296/semovu.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jQHBQfM/draw_your_game_mod_apk_unlimited_money.pdfIn PDF document text
    • http://limowoduramu.iblogger.org/peter_pan_2003_script.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/fjg3rjP/freepik_heart_icon.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/G2WMjfw/nokerad.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
    • http://wokasob.rf.gd/python_string_format_online.pdfIn PDF document text
    • http://mebexadesojixip.rf.gd/puduxavufev.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/trustedinstaller._exe_windows_7_x64.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/ankush_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/sukik.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/silk_bed_sheets_uk.pdfIn PDF document text
    • http://nonogopikizezed.rf.gd/biwexujukolixefubefavu.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/belling_b190mf_double_oven_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/bezier_spline_plugin_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/buy_acrylic_sheets_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/surokojirogamojire.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_off0000c1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FA 5336 bytes
SHA-256: 527bfbfe90324a72093d09c68955593f49cba832d15dbe740e8abd68bb858419
font_01_sfnt_off0000d3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F2 9496 bytes
SHA-256: 3492439d10853431fb78b9618f9a19fc0d263ba4b0277fc38b796c2b8dfd6e99
font_02_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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