Malicious PDF — malware analysis report

Static analysis result for SHA-256 4148552281bcbd62…

MALICIOUS

PDF

71.3 KB Created: 2021-02-19 17:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c62110d494f1d796ea13df3a1268d2a2 SHA-1: b1d00d2022c6485906c0da390ccd23a50d742a7e SHA-256: 4148552281bcbd62f6ee8be8565325b0ea7e195d796a20a46965f5ea57f988b6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=download+imvu+apk PDF link annotation
    • https://cdn.sqhk.co/rapekerokemo/5vXgjyG/kewivemeganu.pdfIn PDF document text
    • http://xubaseki.iblogger.org/good_morning_ka_photo_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/gigeOMB/70587977598.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/jchhgcL/93663280709.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/iegjhi1/hands_cramping_up_while_sleeping.pdfIn PDF document text
    • https://cdn.sqhk.co/kixepijap/gfjby4g/64324792218.pdfIn PDF document text
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/f99e8b2cf8.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/0da2de7a3049c83.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/idXggS9/watch_ball_drop_times_square_hotel.pdfIn PDF document text
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/cf1d90c7b9e.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/ieyighe/xinaj.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/luborinizu/82900474521.pdfIn PDF document text
    • http://berojopuzenon.rf.gd/fapemukid.pdfIn PDF document text
    • http://xugomoxuniwemo.rf.gd/business_mathematics_bcom_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/tewasovesijokej.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/wedding_invitation_card_template_blank.pdfIn PDF document text
    • http://newubopuga.epizy.com/23662826518.pdfIn PDF document text
    • http://piwefijegiv.epizy.com/fipiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/it_business_analyst_resume_template.pdfIn PDF document text
    • http://suzufesa.epizy.com/android_backup_all_apps_and_settings.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_off0000dc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 5048 bytes
SHA-256: dec848ee7996d87b27d0e672cd754979bd3d8b162635346ed398d2b663a54e8c
font_01_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 10280 bytes
SHA-256: ce33b1636554dc3672fde16668cebd37daa6a18dd30f6767dc1def346c2a9c7f

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