Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3697aedcc4c899…

MALICIOUS

PDF

69.0 KB Created: 2021-02-27 02:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f11cf3caedfc984e2cd74c39ef32c2a1 SHA-1: 0db529176df092ca7e23c571e6eac379466ab936 SHA-256: 5c3697aedcc4c8993d9789976608a7520d47ce19f81f51ad2c6f347c8cb741a0
254 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=what+does+disciple+mean+in+the+bible In PDF document text
    • http://salebox.shop/old_testament_bible_history_guidebooklmqjj.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/fiaQHQB/crossroads_mall_omaha_covid_testing.pdfIn PDF document text
    • http://prazdnikprosto.ru/75039081951kg4tx.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/iS3gjia/neko_atsume_kitty_collector_theme.pdfIn PDF document text
    • https://kokodukitibov.weebly.com/uploads/1/3/4/6/134609001/988535.pdfIn PDF document text
    • https://selemuja.weebly.com/uploads/1/3/4/8/134893326/310540.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/H1g64hi/woodworking_bench_for_sale_ireland.pdfIn PDF document text
    • https://cdn.sqhk.co/sowodopevew/Cihhe1b/tunein_premium_free_account.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/Th4TigR/ropekoxedexulalodizasun.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/jazofi/are_hearing_aid_domes_made_of_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/twin_star_heater_fireplace.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/accrued_dividends_in_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/zamijegegadezawajaluvuma.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/sinupun.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/the_lightning_thief_movie_cast.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_off0000d108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD108 5368 bytes
SHA-256: 401a1ef60c8e918f5a0feb953add235bde1c2c583a9e5ca0ab543b8db5b3773c
font_01_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 10436 bytes
SHA-256: 20d797c4c1ea9a8c5668224e86c145b15daa477b429d18813eb4186235c89c4f

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