Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3f978fe088543f…

MALICIOUS

PDF

72.5 KB Created: 2021-02-15 05:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d81d07f178abd766a3a3873c11ac8de4 SHA-1: 0fe6a5dbe38c1f652b1888c3f5956b8660d556c5 SHA-256: af3f978fe088543f9fcc70e0ce5de28e0959aa60f35e95b1bcb3bc4be5a16a12
194 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
  • 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/wix?keyword=alphabet+missing+letters+worksheets+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4419645/normal_5fc7c91e8cd01.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/3gXiazt/kupegabovugeluvusunupigez.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/cEjfQZY/stickman_downhill_motocross_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/jdhaiaE/jailbroken_fire_tv_cube_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408991/normal_6004dfb89b53a.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/hbGKheQ/cyclic_pathway_example.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/4ldhe8B/cricket_flip_phones_at_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/dumadomizore/KhfjbJg/corporate_strategic_planning_template.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/TgefOyI/94368652917.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420432/normal_5fde3f5ebe4cf.pdfIn PDF document text
    • http://claire-irk.ru/sodegefijyr7.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/nhahigf/arcade_car_smash_offline_traffic_racing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/gmQ0gfl/gunshot_sound_download_mp3.pdfIn PDF document text
    • http://texno3ua.com/kassadin_mid_guide_s9rspnr.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/nafibanefexex/21877949799.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_off0000dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB2 5740 bytes
SHA-256: ca116d32b6920324fe31954fe8dd840f51fe72c472571ada14c99fd0dc739c5c
font_01_sfnt_off0000ef1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 11040 bytes
SHA-256: f16dc966d811da1d5bf1aee4db213d3ff24fb3474ffa9a79ce234082bdae7c37