Malicious PDF — malware analysis report

Static analysis result for SHA-256 739ece3c4793d5e5…

MALICIOUS

PDF

65.7 KB Created: 2021-03-03 04:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3d4718a803853b3c534c0f0422c1ae7c SHA-1: 4403446a88d01eaf1f31628495c4269dc1ab141b SHA-256: 739ece3c4793d5e539c8ca1fce83305855c5ae38730b05444479bb65618cf15f
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://fokemale.ru/aws?utm_term=cazadores+de+sombras+renacimiento+2 PDF link annotation
    • http://devgame.design/405680956429522s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_6006eb45c2c1a.pdfIn PDF document text
    • http://jelebojibujij.iblogger.org/bangla_emon_khan_song_video_hd.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/mubefula/xexelepenibuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/wolut.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/top_nursing_diagnosis_for_congestive_heart_failure.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/16002535656.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/blank_5_day_week_calendar_template.pdfIn PDF document text
    • http://tolubilusavo.epizy.com/how_much_is_a_singer_treadle_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/kikilupakawopapisudu.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/cantoral_catolico_con_notas.pdfIn PDF document text
    • http://romamosok.rf.gd/daneguwitaka.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/10975514714.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/dehydration_guidelines_pediatrics.pdfIn PDF document text
    • http://mukuraxoviniron.rf.gd/71487168190.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_off0000c38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38F 5280 bytes
SHA-256: e8a65b6865b9e84d7c735abd5e19b210c4564ffa910637035711240f61fe7b4e
font_01_sfnt_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 11200 bytes
SHA-256: f7eaa761371a8b0c973fdebd4238ec77b404230639913603e594a22c2d851b46