Malicious PDF — malware analysis report

Static analysis result for SHA-256 11faae61f362bf02…

MALICIOUS

PDF

65.0 KB Created: 2021-02-22 18:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c25d403b91d464974b81f6ef734a17ec SHA-1: c986e8a426689c35d6689032c702352e7f22efe2 SHA-256: 11faae61f362bf025c2d5d0e5625eae96bb597428ebbc49685fdbca340653bef
156 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
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://baarspo.ru/wix?keyword=harrison+mt+cafe PDF link annotation
    • http://repaircreditscore.info/66130690675f34h8.pdfIn PDF document text
    • http://topstop.site/software_para_el_monitoreo_de_redk76ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_602f795935550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_6016f001d9b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_602ef71a0a4f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500679/normal_5fd9371f6a6fb.pdfIn PDF document text
    • http://gobigs.space/bapuzvy7na.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6010f09d73d90.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/fekaduvopigab/aimer7_guide_fortnite.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/34221400227.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/cnet_s_vlc_player.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/pagika.pdfIn PDF document text
    • http://gojuveri.rf.gd/david_ludwig_always_hungry.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/retiv.pdfIn PDF document text
    • http://zuzitubop.rf.gd/miller_bobcat_250_diesel.pdfIn PDF document text
    • http://sowawobajomo.rf.gd/80878331404.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_off0000c166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC166 4956 bytes
SHA-256: f2b2abf78651dd47f614ab400936ad2d9cb2851b5f7b3f3437fa365b615ff64a
font_01_sfnt_off0000d22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22B 11460 bytes
SHA-256: 6440044b62447faf86cf113608ea21aaa20b688b52aed62a90b68df3ea1d40ca