Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f824e35d5b5a0b2…

MALICIOUS

PDF

64.8 KB Created: 2021-02-02 19:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 652b9f1231f31cb01f04e0c9235182fe SHA-1: 068413e0e74afafce88227bc1f0e7729457a4726 SHA-256: 2f824e35d5b5a0b283de5bd624fe8a45bc6bc23a58a512d6286d9d685087885f
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/wb?keyword=jubilee%20industries%20holdings%20ltd%20annual%20report%202018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fd6440926cdc.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/gfhcdij/71388947725.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/BHiirhd/27540312643.pdfIn PDF document text
    • https://xogiwudib.weebly.com/uploads/1/3/4/7/134715522/3aa675ad.pdfIn PDF document text
    • https://tabekemaw.weebly.com/uploads/1/3/0/8/130874329/5081006.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374521/normal_5ffa6455636b3.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/jcBLjdO/lego_city_deep_sea_explorers_2020.pdfIn PDF document text
    • https://sozivaxuzafuzi.weebly.com/uploads/1/3/1/8/131856435/lemar_wevafigobakape_govepu_wekepil.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/bepukuba/kaththi_telugu_movie_songs.pdfIn PDF document text
    • http://netubufetolanup.rf.gd/16001038672.pdfIn PDF document text
    • http://lujuxug.epizy.com/aluminium_windows_sizes.pdfIn PDF document text
    • http://xefejada.epizy.com/dhl_shipment_airway_bill.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/play_store_pro_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/99285044170.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/fb_lite_free_apkpure.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_off0000baf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF4 5868 bytes
SHA-256: 4f6baeb483eef06fc911455f6f1b4632c501237a752f831d73b54e39e69c2518
font_01_sfnt_off0000ced9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED9 11160 bytes
SHA-256: 85d3d37b5ebf92e12330122583910e8d4a14b74f45b8c270811e399ded538a6d

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