Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aac4bf2db85efe8…

MALICIOUS

PDF

73.2 KB Created: 2021-02-27 02:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f86d5ab018b9ab65360de9060f5ff88d SHA-1: d2e46c98fc6a08e40bd72d16a43f44fa105a3fd6 SHA-256: 7aac4bf2db85efe82c071baeebaa8028d7bdf443910efa6966c52fb68edd4bd3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=anglican+rosary+prayer+book In PDF document text
    • http://spainsale.pro/fiwufurimisebuwazubozkhx5p.pdfIn PDF document text
    • http://carins.info/dictionary_english_french_free_for_pcu827k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_600a9fa56ec99.pdfIn PDF document text
    • http://nat-yoga.space/principles_of_marketing_by_philip_kotler_13th_edition6f9zh.pdfIn PDF document text
    • http://spacexfoundation.net/zifemopategorojuzorajila1xw79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_6008eb785f23b.pdfIn PDF document text
    • http://baranaydin.org/40987794233d59g6.pdfIn PDF document text
    • http://italiabeach.space/bible_study_guide_for_all_ages_timeline4t4vc.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/vesubodufisi/cuisine_royale_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/26429289983.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/24755476943.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/do_you_have_to_read_the_artemis_fowl_books_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/zajedo.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/avision_portable_scanner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/31382306667.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/backup_iphone_android_whatsapp.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/bethesda_tireoide.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_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 5396 bytes
SHA-256: 26cefe0d7114c23a00252082e597a4d0a2ea34b313580cfc691b44c56f6abbb4
font_01_sfnt_off0000f54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54C 10208 bytes
SHA-256: da6082a4a162281a85aa2a440268545bf6cd98b93a2d5406219bfb4e31c6414e