Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c19a25a77c47f59…

MALICIOUS

PDF

70.2 KB Created: 2021-02-25 05:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7507449c69078aa46b6f874e7f64c69b SHA-1: 32e30b3f6f860aa3a0d9f9bcecf46afa52a0eeab SHA-256: 8c19a25a77c47f590ae0037c421696a43e0147d73658b71696c8c9335de4409d
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://crophysi.ru/award?keyword=realspace+magellan+collection+corner+desk+dimensions In PDF document text
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/4630819.pdfIn PDF document text
    • https://zufuleruzu.weebly.com/uploads/1/3/1/6/131637307/8022dd8d.pdfIn PDF document text
    • https://jolofoni.weebly.com/uploads/1/3/4/0/134042869/3404a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446634/normal_6006c10beb4b9.pdfIn PDF document text
    • https://regapopuro.weebly.com/uploads/1/3/5/9/135964604/lifupewolanozitivu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_5fe0febf38c82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415065/normal_5ffc80e457786.pdfIn PDF document text
    • https://nozabuzewetuk.weebly.com/uploads/1/3/2/6/132683147/2f8632b47.pdfIn PDF document text
    • http://tizukovedatuv.22web.org/3774745629.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/90537757103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491686/normal_6015e93c24629.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
    • http://sutexuvidag.myartsonline.com/vegetarian_food_recipes_without_onion_garlic.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/velidonodadevano.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/79107614261.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/king_wasiu_ayinde_marshal_music_s.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/roxetokajusukinik.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/very_angry_whatsapp_status.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_off0000c864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC864 5252 bytes
SHA-256: 24b80b534c9fc0b9a8d1a2e3c3e03d2205673d3ad7257a88f50ad9abcb8781c9
font_01_sfnt_off0000da2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2B 10296 bytes
SHA-256: f12f68ef878962e48177bf9ebabf9c77149a47b2be5e0de10c65814890c0f9be
font_02_sfnt_off0000fd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD49 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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