Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6efca3f6f860bdc…

MALICIOUS

PDF

75.3 KB Created: 2021-03-11 10:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 33d85c596da3f1916f1cac54466c99c7 SHA-1: 4b369016c68ded4e2f3227354be1573377412deb SHA-256: b6efca3f6f860bdc00d4af424f3a505100d66818d09367230852d9be2ecd24a6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=delegation+process+pdf In PDF document text
    • http://pugisapi.mypressonline.com/rulepopuwiropiwali.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/7125442201299jev.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/trn_c_tho__nng.pdfIn PDF document text
    • http://tehnopolis.org/34473302719kv2qp.pdfIn PDF document text
    • http://goromeo.club/python_classification_report_confusion_matrix5hg1v.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/food_life_hacks_for_school.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/tamepupunigudi.pdfIn PDF document text
    • http://itverys.space/abraham_hicks_ask_and_it_is_given9y3g2.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/pevurez.pdfIn PDF document text
    • http://kyrgyztours.com/xexotipepux6b1q9.pdfIn PDF document text
    • http://fixmarker.fun/40353517452cmkl3.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/savifin/online_challan_form_bise_lahore.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/sbi_bank_po_exam_study_material_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/60154415436.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/52499396640.pdfIn PDF document text
    • http://jowosos.myartsonline.com/causative_advanced_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/85262729501.pdfIn PDF document text
    • http://womidelere.myartsonline.com/wejixonesutemetiw.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_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 5320 bytes
SHA-256: cacdcb948a3de69575c1f6422fa7ef6fe43dd836d2ffde9a46013c8a7794d0d4
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 10724 bytes
SHA-256: 747b08ce34704f9f0d4b3a90aa8d82ab8aee2fffe6835a5ddeb7d5852bfb586b