Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df8bd0f386ff7c1…

MALICIOUS

PDF

71.0 KB Created: 2021-02-07 01:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 28d218bedcdb6d57a9406c0fdc0ca317 SHA-1: b295a3c52e8e18fd025680dca691ee455b127ddd SHA-256: 7df8bd0f386ff7c113200ad1b738d1d6bfcb535063991f0f2588d7f557411c7d
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://crophysi.ru/wb?keyword=amadeus%20airline%20reservation%20system In PDF document text
    • https://cdn.sqhk.co/bagadogod/gdGDghH/28884252946.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/rhcsA0C/jirukapikodozumeputovade.pdfIn PDF document text
    • https://cdn.sqhk.co/rerunaropiz/bjflgdH/hocus_pocus_dani_cardigan.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/4jigchj/worship_songs_chords_key_of_g.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/4hfGqji/huawei_health_apk_beta.pdfIn PDF document text
    • http://eurofamily.pro/inaugural_meeting_minutes_templatelaf5v.pdfIn PDF document text
    • https://mubazujozij.weebly.com/uploads/1/3/4/7/134705676/843777.pdfIn PDF document text
    • http://xurijozidarov.22web.org/43541387.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/Ie6iihe/jaxizopukawatarololux.pdfIn PDF document text
    • https://cdn.sqhk.co/zewawugawa/aggNicb/color_block_vans_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/jYjjjgh/79214483209.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/hgexRib/battle_at_the_lake_seattle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fapudimilo.rf.gd/30653974972.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/how_to_music_on_filmora.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/timesaver_speaking_activities.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_off0000dafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFB 5124 bytes
SHA-256: a0405ff8cd88c038ddf734a8d155aa867e0fa47f0be38cb2646d889e4166600f
font_01_sfnt_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 10076 bytes
SHA-256: 646c635722c7f10cbb03632ea7c0ec510d6b749e41f3341745c7485fa0a0f831

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