Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5665f1cff3fe23…

MALICIOUS

PDF

73.4 KB Created: 2021-01-04 17:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 643642df277df4767799fcb0da33e9bb SHA-1: 9d1c55fbccf4f50ef09a3753e7cc54460eb1d097 SHA-256: ba5665f1cff3fe23c0b65a230209314b47b82463f4a5ca13d2aeef67d1240f12
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/wb?keyword=mother%20earth%20products%20shelf%20life In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465548/normal_5fc6938d1cfaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_5fb7948c08511.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/5103953.pdfIn PDF document text
    • https://cdn.sqhk.co/banifiga/dWgiLgg/can_notepad_compare_folders.pdfIn PDF document text
    • https://wexipemeb.weebly.com/uploads/1/3/4/8/134860193/figejobemeruboradosa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480743/normal_5fe43b90acae6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fcecc289feea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f86f44097ded.pdfIn PDF document text
    • https://domuzowejiro.weebly.com/uploads/1/3/4/3/134360268/zagivabukumewuw.pdfIn PDF document text
    • https://gedibixofesona.weebly.com/uploads/1/3/4/6/134688069/molavodudapufexo.pdfIn PDF document text
    • https://kelesidudukakub.weebly.com/uploads/1/3/5/3/135340861/e7f64ad5a7ce.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/donarepemi/danke_schoen_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/viwimujidalazufev.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/geometry_worksheets_grade_5_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/55074283686.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_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 5248 bytes
SHA-256: d809ad55319d7c4f370dcee632f480369dd0b512a7ad7080d0cdf941df293a5b
font_01_sfnt_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 10324 bytes
SHA-256: 1810edb6cf889bd15baf505b7558b728d2c4c913fd10e3b9d808811fece83f0a

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