Malicious PDF — malware analysis report

Static analysis result for SHA-256 1983feaef3906bd3…

MALICIOUS

PDF

72.6 KB Created: 2021-02-24 11:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5ec5b3693e1595edda05395c86c9b72b SHA-1: 2a3c17a3f41c466005a580af75430db68efd1bd5 SHA-256: 1983feaef3906bd3db73ea5df9cf1d0df0b1278f2587a6eff20708ee38e02a40
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wb?keyword=how%20to%20replace%20a%20lost%20sc%20drivers%20license PDF link annotation
    • https://cdn.sqhk.co/tuwetebep/ByigZia/denon_professional_audio_recorder.pdfIn PDF document text
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/mavovepa.pdfIn PDF document text
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/sunirezi.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/bigefizeve.pdfIn PDF document text
    • https://jofufibiwew.weebly.com/uploads/1/3/5/3/135347649/2410247.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/cmidkhc/24422412047.pdfIn PDF document text
    • https://saxuvelimeno.weebly.com/uploads/1/3/4/4/134480096/7711240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_601d2caa40bc6.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/5b3fc2d2ea486d.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/lakadutof/surf_report_jenness_beach.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/bambi_english_subtitles.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/avast_antivirus_windows_7_ultimate_free.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/65144906499.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/piya_more_video_song_1080p_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/baldor_solucionario.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_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 5180 bytes
SHA-256: d1aa80e663994f0369c6346e9576cef2bde76d644c95299aa16e2ece7e404eed
font_01_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 10188 bytes
SHA-256: cf102bdaebf5849c5a3341d7ae7cb49405d1fec176f074eb1f24b6a1e516c9fc