Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c73033848753b77…

MALICIOUS

PDF

70.6 KB Created: 2021-02-19 00:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 835527548c559a9b7d78639d77d0e63b SHA-1: 887a287f5ee2effb91b66bea07128db180c092b5 SHA-256: 7c73033848753b773ca36387121e90a0a2f2adb13dab0ac139d82b46b05e93ac
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://crophysi.ru/123?utm_term=when+you+do+wrong+quotes In PDF document text
    • https://cdn.sqhk.co/tefozakozup/f3hdngh/nbc_sports_gold_app_samsung_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/Zhigcjb/81807132380.pdfIn PDF document text
    • https://cdn.sqhk.co/lixijadimit/Fxheiii/kekerimunovezuropirili.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/Cghjgha/84828093009.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/gggdyw9/white_horse_running_video.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/chijejb/pixel_s_unknown_battleground_play_online.pdfIn PDF document text
    • http://greatholl.com/zujoluwan6gity.pdfIn PDF document text
    • http://trudogoliya.online/prayers_that_avail_much_by_germaine_copeland5pfg9.pdfIn PDF document text
    • http://mastericy-chistoty.ru/roraxomuber2i1pr.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/iNgczhi/art_of_war_movie_actors.pdfIn PDF document text
    • http://alisaborodaenko.design/instant_email_t-_mobile_loginee25p.pdfIn PDF document text
    • http://leaninrzpd.site/rurizx7uf6.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/retisovojor/l1b_visa_interview_questions_and_answers_chennai.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/99226141677.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/letotimasapobitusesexutug.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_off0000d785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD785 5180 bytes
SHA-256: ef03a997d8922c5b12de5ca7300f29717d8ee70bddb7c904c21c9727971bd155
font_01_sfnt_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 10656 bytes
SHA-256: 825d2f507c9f954e3a9f153cf667db8e5d607211ec10a309a6aa0f28d4136cda