Malicious PDF — malware analysis report

Static analysis result for SHA-256 95631122fec6b5dd…

MALICIOUS

PDF

73.7 KB Created: 2021-02-20 01:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2188548be640326f4037b49e72865a18 SHA-1: d1b00aa38729612979cae6ac314fcaf49cbad498 SHA-256: 95631122fec6b5ddc859045237fa46a33258281f0645ab23f3231342363d2f5f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=dark%20souls%203%20top%2010%20hardest%20bosses PDF link annotation
    • https://cdn.sqhk.co/jotenitix/ibqNaia/xudizov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5ffcfb707ccbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_602b08de43991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_601e03cdef1b5.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/aTVJoqR/vovobonidik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_60212d261640b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_6017f99ae398d.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/eMjckhi/kokatudunapeva.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/wewuxuviwar/acting_skills_and_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/best_app_to_backup_photos_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/xugamaxaxuge.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/64164256004.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/37998157395.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/78804835632.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/iq_test_questions_with_answers_sinhala.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_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 5608 bytes
SHA-256: 139ed4a72522b1fb5ecc12c192587e538c77cf970625f8ffce2cd00020b716a7
font_01_sfnt_off0000f72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 10156 bytes
SHA-256: 42907eda4dfcaeb0e3ae5ab1c327b421cf9353ce23e3b9dcd35058c36935f197