Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c3c98ad42a7da9…

MALICIOUS

PDF

74.7 KB Created: 2021-02-13 09:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a295c60e9a513e474dfafef5a09634ef SHA-1: cc1bad216a9e7b7b1be826f5abae43615d7196f5 SHA-256: d5c3c98ad42a7da9e776afd39bbd29a50525d7ac92487c9c02f38cb2310bb867
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=game%20dev%20tycoon%20guide%201.%206.%2013 PDF link annotation
    • https://cdn.sqhk.co/tigafita/igcigsU/skin_among_us_in_minecraft.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/fefewiwoxif-xokerit-zozesodoxaz-jivigukufugobob.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/fiwumipepexu.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/Ph6CYji/zojimu.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/cif7aUY/flickr_unavailable_apple_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/QgfBcia/tucson_mineral_and_gem_world_tucson_az_85735.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/Ovgf5hb/flying_dragon_robot_army_truck_transform_games.pdfIn PDF document text
    • http://zopetiwan.22web.org/71330969413.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/0yij3hh/repawutuwevoj.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/fugovagapun-gumute-xotake.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/wenobagupexekap/piriformis_muscle_injection_medical_code.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/sebawapujamutuxened.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/hydrolyst_warframe_guide.pdfIn PDF document text
    • http://wuzatefiroko.epizy.com/android_system_apps_running_in_background_notification.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/91758801119.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_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 5548 bytes
SHA-256: 1a3ddbdd6acd6801af9492cd3539eaea6a33196317d3ad73b6feed9bb6ee77d3
font_01_sfnt_off0000fa64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 10472 bytes
SHA-256: 484a18c4aba4036e155e8283ab480664339fd5cca51e42fe727602a72b7957ce

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