Malicious PDF — malware analysis report

Static analysis result for SHA-256 419c6fda84616d19…

MALICIOUS

PDF

73.0 KB Created: 2021-02-21 08:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b288dd6f48cd2acccef880df61937eed SHA-1: 712139a13d365f926e9a7e21fb33f6d2dd0b27a6 SHA-256: 419c6fda84616d196bd0031c111aa920126973de7bbcce2722ee1ed45dd51146
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://jacksth.ru/wix?keyword=depression+and+other+magic+tricks+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374983/normal_601d6a1f6371b.pdfIn PDF document text
    • http://sosiwuro.iblogger.org/characteristics_of_good_research_tool.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/mujuvevekugi.pdfIn PDF document text
    • http://nelibagaxo.iblogger.org/4679282864.pdfIn PDF document text
    • http://bukuvud.22web.org/corporate_finance_associates.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/9811337ebb8a1.pdfIn PDF document text
    • http://jumpfs.space/my_rotten_redheaded_older_brother_synopsispg1b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fdcd6d4dfe9f.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/menozuzujomesivobewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_600e2142bd3ad.pdfIn PDF document text
    • https://kikafizujugu.weebly.com/uploads/1/3/4/0/134012642/3662742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_600b05a5c1a65.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/vebisop/46962174701.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/free_google_chrome_installer_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/2634265619.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/boss_movie_1080p_video_song.pdfIn PDF document text
    • http://pepabalexesoge.rf.gd/ny_state_mandated_reporter_hotline.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/disacaridos_estructura.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_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 5600 bytes
SHA-256: 2f44500e24823a033a8dd631c7779a06c71db42167656027e8b585d865a5d545
font_01_sfnt_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 10680 bytes
SHA-256: 877be4d08f6733e403ea7f84b322d9121f419554bf39c8e5d73774b5e2ef8032

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