Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a1a899a997c2a0…

MALICIOUS

PDF

71.4 KB Created: 2021-01-26 23:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b5f1944d82e6722f2ead4fc2f2a48f4a SHA-1: 1ca12db05ccc08f8aaf09920d78babe15c4b0514 SHA-256: a3a1a899a997c2a00fc1f6c2bf27a37fe22af1fd6608918ab9ab5ae04af5d8c9
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://crophysi.ru/wb?keyword=smart%20tv%2060%20inch%20price In PDF document text
    • https://cdn.sqhk.co/wazofovam/hggiJhb/imdb_movies_coming_soon.pdfIn PDF document text
    • http://winoorama.website/rateluluboginosinawozub4nmwn.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/cicYie1/shaolin_kung_fu.pdfIn PDF document text
    • http://reduslim-italia.website/wopuxrw4cy.pdfIn PDF document text
    • https://cdn.sqhk.co/kubarevopew/Vjeghie/26580288683.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/bijoEC9/toon_blast_hack_android_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495531/normal_5fc83b28d07cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5fe851ca20f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_600d36767abbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5fdfce69baf57.pdfIn PDF document text
    • https://cdn.sqhk.co/sarafogu/fFgjeij/cossacks_3_cheats_instant_build.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/5ydqKic/you_re_a_naughty_boy_meme.pdfIn PDF document text
    • http://discount50.pro/94532353944sjja4.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/dP7A6hc/79344944802.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/gedexim/what_is_semitone_in_sheet_music.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_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 5420 bytes
SHA-256: e558b0225f4a1d985933687cb934478b744b3f167f6992dde21393a38b78911d
font_01_sfnt_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 10852 bytes
SHA-256: 5a158abdf666483a98dfaa7523e337ffc922df19b2352da11e6679b566c32778