Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3b420fa7f5e037…

MALICIOUS

PDF

66.7 KB Created: 2021-02-20 19:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f5b868ed928140b1870dfd9b03853ca SHA-1: b0c4348e007463a4080a01acff4e3383b764e8a9 SHA-256: 5a3b420fa7f5e037b07844b16e513bb9bd8e1320b32d5a9041153492a5699b02
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://yafferge.ru/wix?keyword=national+mah+jongg+cards+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_602463235e8f1.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/jbjjFjf/best_vault_app_for_android_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/tijanukubo/YggcJXZ/nenuligujor.pdfIn PDF document text
    • https://cdn.sqhk.co/perigupa/VxzLLYR/38258542057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422643/normal_5fdbc1fe8e3e3.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/XOxFgcl/1944302637.pdfIn PDF document text
    • http://vedice.ru/simple_past_affirmative_negative_interrogative_formsui1e4.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/gfDiigh/harvard_business_review_free_webinars.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_600c9d61c61b1.pdfIn PDF document text
    • http://hurleyshamburgers.com/clinical_cardiology_made_ridiculousl9npxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/rar_archiver_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/angadi_theru_full_movie_free_tamilrockers.pdfIn PDF document text
    • http://juvejuvikanu.epizy.com/acoustic_auditorium_design.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/barbie_princess_charm_school_uniform_costume.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0E 5340 bytes
SHA-256: e713f04fe9a31c799016c1c71caaed38422da2296f9cdd9a6affcee520415c14
font_01_sfnt_off0000ccf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF9 10104 bytes
SHA-256: 33044985aadeaef717cba5573e4828907fd06f0155d2f808615bcc9c0f44f235
font_02_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176