Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c11f836870acbb1…

MALICIOUS

PDF

71.2 KB Created: 2021-02-27 08:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8847e36ede3f25aaa251795c48489661 SHA-1: b6d4237c9c42b267c3f952febe391ff04f151269 SHA-256: 3c11f836870acbb176143f5df5618ecbdb7c5db50c9b4feb2490446ac01de22d
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://midufefew.ru/wix?keyword=genetics+and+molecular+biology+worksheet+answers PDF link annotation
    • https://tibomomaludo.weebly.com/uploads/1/3/0/9/130969572/pikoduke_lakukozilazuw_temepawarabopu.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/P3hciVR/adding_upfitter_switches_to_ram_2500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_600c06ff29ca8.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/Dghjejc/75457342220.pdfIn PDF document text
    • https://datipozor.weebly.com/uploads/1/3/0/8/130813945/24321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465387/normal_6035aea5a745f.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ibViabk/buckist_best_bucket_list_apps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454550/normal_5fc6c75ea3b77.pdfIn PDF document text
    • https://wixevilit.weebly.com/uploads/1/3/4/8/134873569/32b9921653.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/fadupazageraf/domupebedogapit.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/ps2_games_for_ps2.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/chess_game_for_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/60753860471.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/31884011078.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/cftc_and_ice_commitments_of_traders_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/how_do_you_heal_after_a_miscarriage.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/birthday_cake_image_images.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_off0000d866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 5780 bytes
SHA-256: 3d5860dc3c90d39a9fa714a78941efc5bcc3dce203b5543504be03fde008ce5b
font_01_sfnt_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 10368 bytes
SHA-256: 83427870feb6bb4103ffcc55eb1169558c4db077a6cd0e8ca771d72bd6f0392f

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