Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff8c13d666218c8…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 08:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9ecebe1d9615adc705175ea8f3f44c2d SHA-1: ce7bae0431eb7faf5084c4541938e05748148d25 SHA-256: dff8c13d666218c8e55628c8e37b2ad00deffba99f2eb103ffe449d7caa75327
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://jacksth.ru/wix?keyword=m.+boucher+de+perthes PDF link annotation
    • https://cdn.sqhk.co/wifinalimow/iijbzjf/superhero_fighters_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/denobafopum/lgghjjf/pixel_petz_golden_token.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/jsicheu/dunk_shot_bounce_challenge_20.pdfIn PDF document text
    • http://medupaj.iblogger.org/harvard_reference_guide_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_601dbde384d8b.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/iirjhSE/94311111008.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/wKieid4/53051467804.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wumimed.rf.gd/pemeda.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/90109087747.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/godfather_theme_virtual_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/73937964578.pdfIn PDF document text
    • http://zijemuviwovo.rf.gd/14918782773.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/bhakti_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/flyer_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/posiwozam.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/cisco_2960_x_series_switch_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/counter_strike_new_version_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/2791165071.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_off0000dfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC2 5096 bytes
SHA-256: 1c1a91394d871a48aa22ca9f06162671d924f47cd52fb97cd6255ab467dbb73c
font_01_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 11220 bytes
SHA-256: 5dd0e0e68381a4c3e7f84df40bad5169863612a08532afa77332e51243c8309f