Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a297437b491efb…

MALICIOUS

PDF

69.5 KB Created: 2021-03-06 07:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 16472330540b32adbcfbb109fc305c65 SHA-1: e4c556ec6c5402c884c4683dbfcad42ba12f0bf2 SHA-256: b9a297437b491efb738df60e7c4637e5bc33a843e9d8112ece1a48cacecfa56b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/award?keyword=what+is+another+word+for+violent+criminal PDF link annotation
    • https://xagofutaruv.weebly.com/uploads/1/3/4/3/134344009/8243954.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/4518385.pdfIn PDF document text
    • https://kilazazemuvazu.weebly.com/uploads/1/3/1/4/131452741/posezifa.pdfIn PDF document text
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/7747075.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/siretaw-gadoxaru-wirodemewekelo-jonupazajuf.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/principles_of_geotechnical_engineering_7th_edition_solution_manual_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/60dda1f2-7e8c-4134-85de-7d2731aa40fa/air_force_1_pixel_gold_chain_nike.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/bowaw.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_4158bacb99a047cbb11596d4becf2564.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/future_simple_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/dojaw.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_784282cbecca4d5ca334db3bf29c5bc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bb0182-5865-4a29-949d-cb0bc31d0efc/34577707912.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/braun_series_9_9095cc_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/meant_to_be_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/letter_n_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/40045075480.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/demezinojaturafabu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/jeevan_praman_patra_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9e07c5-76a2-4633-bf7d-2c0ea7cc296b/milton_bradley_game_of_life_rules_2007.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/76980596951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79e8324-da36-4f1a-9092-df9b2ee76b7a/dunkin_donuts_caramel_latte_carbs.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_off0000d4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C8 5424 bytes
SHA-256: 162a0d4024476d48648f12d21793fc09229ac23564387419b5e6c1ed4b0bd9f1
font_01_sfnt_off0000e730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE730 9720 bytes
SHA-256: 015b11060815bf71366e3ad2306db0199def3f9fe8f475594941cba41c134dbd

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