Malicious PDF — malware analysis report

Static analysis result for SHA-256 c107ac46b2adb7d2…

MALICIOUS

PDF

56.2 KB Created: 2020-10-30 16:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 357fdecc36a28c76ea6915fcccc9bde3 SHA-1: a7c76874daf9247c52aba82f17e497ef7a8dba4c SHA-256: c107ac46b2adb7d25b3985fda138c4f0d392511fa064d1492f1c21f379480273
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.cc/pify?keyword=a%252B+certification+jobs+with+no+experience In PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/9906351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5f9924272d57a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f8ec575b5c2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5f9b09475a29e.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/xuzed/life_in_a_one_room_schoolhouse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0a4e1a-92c6-4c9a-a9b0-f9c4008af118/sazovejopuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3629948a-e170-4683-bfab-85ebb67e35fe/zobepaf.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/abandonment_to_divine_providence_caussade.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/elite_force_m4_cqb_airsoft_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cefe49-64e0-4390-95d8-0e0f7d0c20e4/muteze.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/badiwizunorejaxefuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee1c571-2e9a-4456-ad44-d7d6ea72cba9/38551448893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8023/5191/files/bofelajexizavagotevoropod.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_off00009cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD4 5436 bytes
SHA-256: 37f211b6ea41cf9b449f8b2e61bdb2a469cd458fb9716a7dd13cd91d3b6a7333
font_01_sfnt_off0000af63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF63 10800 bytes
SHA-256: ead19e27d4f2a77e7f33ef3067a58f9380394c1b6c21fb005b7dd7e468f51fe3