Malicious PDF — malware analysis report

Static analysis result for SHA-256 63bc195cef441904…

MALICIOUS

PDF

84.4 KB Created: 2021-04-14 21:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 34acbf0d19ff185de9b325f96a3d2e03 SHA-1: a1c17df98d6bc4dfeec3f435537e29e98e09520d SHA-256: 63bc195cef441904c3a5bc477c18a9388924fc49181366fe85dbcc5ab99735fa
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URL that redirects to a search result for technical support, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/strik?utm_term=how+do+i+reset+my+samsung+blu+ray+player+bd+j5100 PDF link annotation
    • https://cdn.sqhk.co/laxegipo/ZNgf9Dg/maximum_carnage_fortnite.pdfIn PDF document text
    • http://fitnesspack.net/24382561994pig34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fcaab3a54d6a.pdfIn PDF document text
    • https://cdn.sqhk.co/bipokagiti/gjhhwjd/gomumaxavifu.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/Tjbhchf/boxer_bot_app_on_kindle_fire.pdfIn PDF document text
    • http://jobs-ingenieur.best/standardized_reading_comprehension_test_for_grade_7tgvqd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_60525e5a67b0d.pdfIn PDF document text
    • http://presentinsta.site/topuporudotoseposia08wb.pdfIn PDF document text
    • http://carins.info/855697912546uood.pdfIn PDF document text
    • http://italywow.space/dazodafunegobogaragerem34r5o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_603bab1acf7bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/star_trek_discovery_season_2_episode_13_watch_online.pdfIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_96ff6270225b468b9aa6fc519882e54f.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_b666a9b7e5aa4fee98b5c2488cc32abd.pdf?index=trueIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_a5eb84f381754924b2694526f61265f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/best_wallpaper_ringtone_app_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe71b8b-e42d-47d6-84cb-56c3179cb530/gerry_marquez_tu_eres_digno_de_gloria_letra.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/how_to_charge_shimano_di2_without_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/corporate_social_responsibility_policy_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/tezosegiwedodafutawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c05aae-b385-4693-8c9f-2bd15fab19c1/what_does_a_prosecution_lawyer_do_in_court.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 5852 bytes
SHA-256: 52dc3136901745d7fd34abb10883d482da65834fb201a6d2c9cf0b5d76d535c8
font_01_sfnt_off000110f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F5 10732 bytes
SHA-256: 4b593d91a6932ff99969d3ad8fd1dafb8de7631eb4c71b846d4c6ca33acffb90
font_02_sfnt_off000135ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34