Malicious PDF — malware analysis report

Static analysis result for SHA-256 636fd50c770b4f6c…

MALICIOUS

PDF

72.5 KB Created: 2021-02-20 07:57:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee9725e245e96219e1989d2211a02151 SHA-1: 556f27f30443d7b27b206873f0fdcc31f6dd9182 SHA-256: 636fd50c770b4f6c378643f9336ffd930e49b1b160588b8eb6f18312fc02c50c
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=garmin%20driveluxe%2050lmt%205%20gps%20navigator In PDF document text
    • https://bovakexigi.weebly.com/uploads/1/3/5/3/135314068/62bb0a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_601b6460a9ba5.pdfIn PDF document text
    • https://rizimajapalikum.weebly.com/uploads/1/3/4/6/134633575/887d793e390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_602de9e4552cc.pdfIn PDF document text
    • https://penixosifa.weebly.com/uploads/1/3/1/4/131482878/b165b0ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462046/normal_5fc953baee5b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_600cf4ffe1578.pdfIn PDF document text
    • https://zizetorusiwewiw.weebly.com/uploads/1/3/5/9/135990502/juleroru-kapituki-vizilibenaja.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/peaky_blinders_season_3_moviesweb.pdfIn PDF document text
    • https://viwukafum.weebly.com/uploads/1/3/0/7/130738591/4729073.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woniladorunuf.epizy.com/can_you_hear_the_bells_are_ringing_far_far_away.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/android_9._0_huawei_mate_10.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/business_model_canvas_alexander_osterwalder.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/bus_simulator_game_2019_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/android_auto_honda_civic_lx.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/gotefotipozusis.pdfIn PDF document text
    • http://molutuganum.epizy.com/93152767273.pdfIn PDF document text
    • http://wokixewo.epizy.com/16078671151.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_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 5704 bytes
SHA-256: f3b9f324ee93e07614c5a65707fa3e17fd70e6158a5cf76d4ab5fb8143fbecf0
font_01_sfnt_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 10088 bytes
SHA-256: b1d9d84ab3abb8c42534a61cbe9c58b76a07a7a2a121826c24598ea0f37b738e