Malicious PDF — malware analysis report

Static analysis result for SHA-256 157b2625249eab1a…

MALICIOUS

PDF

70.6 KB Created: 2021-02-02 03:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1fe04a64583a204839cba4101903aa7f SHA-1: 1e4f4d0b029c9296f416d7b204696974a4cf9d7f SHA-256: 157b2625249eab1a437bba433ed9a486eee24de014d5597d2276de4861653201
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/aws?utm_term=atrophic+lichen+planus+information In PDF document text
    • http://eyebrowthreadingdallastx.com/bein_sports_subscription_malaysiag9i45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459185/normal_600040bca8630.pdfIn PDF document text
    • http://frasqen.online/4704795882f16j5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389355/normal_5ffe0e6a6cd87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_5fd8a18c56a14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495034/normal_5ffa57a88ba10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5fd7faee84550.pdfIn PDF document text
    • https://zavoroxovedigij.weebly.com/uploads/1/3/1/3/131398250/divazuk_mapixu_wezot_dutimopiwamirab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392472/normal_5fed784f500fb.pdfIn PDF document text
    • http://like-store.site/examen_primaria_quinto_grado_segundo_bimestreoygnx.pdfIn PDF document text
    • https://teviwodujote.weebly.com/uploads/1/3/1/4/131453741/9946959.pdfIn PDF document text
    • http://swiss-gear.shop/geografia_e_meio_ambiente_francisco_mendona_downloadmdzks.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogonuvusawi.epizy.com/coupon_template_for_teachers.pdfIn PDF document text
    • http://wopidexojabin.rf.gd/57369659229.pdfIn PDF document text
    • http://tirevotijo.epizy.com/gulzaar_chhaniwala_dj_remix_song.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_off0000d8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E7 5244 bytes
SHA-256: 84e483c083d46879cf3433a7efda33241cb055d58668bee4a20e92edd337edbb
font_01_sfnt_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 10312 bytes
SHA-256: 76f4de054d17eafd20b8e1af1311157c3509a8cd828a95f2a5648c4d83b4ef36

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