Malicious PDF — malware analysis report

Static analysis result for SHA-256 10df8c4c90552631…

MALICIOUS

PDF

77.0 KB Created: 2021-02-11 03:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3fe9c4e972e8cab311775eb217b068f3 SHA-1: 3e9c0c2caaccbbdcfa52ef03b9dc768e21a97f0c SHA-256: 10df8c4c905526311877bee8c868e8fea07f68c20f55aee52bcc6a46b448560e
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/wb?keyword=filipino%20cebuano%20translator%20apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4456389/normal_6006adcb3ebc1.pdfIn PDF document text
    • http://disconto50.info/any_video_online_url_iphonem1535.pdfIn PDF document text
    • http://radanews.site/whatsapp_messenger_app_download_for_laptop1dkba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_6018cedad7bf5.pdfIn PDF document text
    • http://shop50off.info/189914902835la2b.pdfIn PDF document text
    • http://fikepoj.22web.org/29069138452.pdfIn PDF document text
    • http://verenica.net/synonyms_and_antonyms_worksheets_grade_6pvocd.pdfIn PDF document text
    • http://ru-en.xyz/namozorit8ru5.pdfIn PDF document text
    • http://fuvufurewuf.iblogger.org/romance_claude_debussy_sheet_music.pdfIn PDF document text
    • http://reestr.site/90805004730r7ohj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457006/normal_60157acfb12d6.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/fizup/allflex_visual_tag_order_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/blitzcrank_s_poro_roundup_apk.pdfIn PDF document text
    • http://jujeludapivibiw.rf.gd/land_of_nod_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/4x12_half_inch_sheetrock.pdfIn PDF document text
    • http://mugudupo.epizy.com/can_t_touch_this_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/74269265525.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/contact_list_template_pages.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_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 5088 bytes
SHA-256: a07284cb681e6efa3386b352eea2f9993888a788ececc70042f6e8898113328d
font_01_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 11304 bytes
SHA-256: e58f46d1a8c9ff59260b722d1672612e32071aa59828769c7182eb6b1303dc15