Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31b77fb114283af…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 10:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 070f80b8e5c67670496d953bc4681e1a SHA-1: d44f386d1d475babc17d9d816f81f5ec139922ed SHA-256: c31b77fb114283af19f106ca4a59c3f8ba37029289bc080c9b099876db4ffb22
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/wix?keyword=the+artist%2527s+way+full+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410702/normal_5fc9be199395b.pdfIn PDF document text
    • http://gegejobusi.22web.org/83860035610.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/aH0hhhf/alchemy_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/powedaguja/iatgfjg/falling_ball_tower_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_5fda9a03a5e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499935/normal_600c0357be841.pdfIn PDF document text
    • https://cdn.sqhk.co/dotifonuvuwi/hJ9iegi/42581643985.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/jhhHjaO/salaredosebuxozuzujux.pdfIn PDF document text
    • https://cdn.sqhk.co/zumovinej/Fj6jhhh/rc_racer_game_lego.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/ieChhhj/22153122113.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwune/he3Pwul/brain_puzzle_3d_print.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/gishbRV/plotly_dash_run_server_port.pdfIn PDF document text
    • http://tapadobav.iblogger.org/92953611309.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/MihjfOa/86799129933.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/towakog/math_problems_with_answers_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/ncert_class_11_sociology_textbook.pdfIn PDF document text
    • http://xegiseko.epizy.com/minuxajazes.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/vidmate_er_for_android_phone.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_off0000deea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEA 5304 bytes
SHA-256: 7ea3e8dbdcd8823367482b46cc6ea1274a8d739bb55f35a590c19eab0bd4c130
font_01_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 10880 bytes
SHA-256: b27809b12a78fc76067f7169e94df8c43c26bea570c563d6b40c0d8c4716dba2