Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb966cc30674708d…

MALICIOUS

PDF

66.9 KB Created: 2021-02-13 11:30:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 45678fb3b66b8db35a741a7ae5b54f49 SHA-1: a45915c3c8add2220d6123e751fbd64eccca05ed SHA-256: eb966cc30674708d8e62f9dba11fb299b78d19a281e858c8f73ab0b2347ebc4e
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/wix?keyword=characteristics+of+living+things+worksheet+answer+key In PDF document text
    • https://lubigovoxudi.weebly.com/uploads/1/3/4/1/134109264/lutobaxilipowinibe.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/suramotezituvub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_600cfb12c4b93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390366/normal_5ff499f79568b.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/fd6f240a44f1.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/8196989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5fd855f8324de.pdfIn PDF document text
    • https://giloxegikejuzun.weebly.com/uploads/1/3/4/7/134712531/kotafefibe.pdfIn PDF document text
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/7251029.pdfIn PDF document text
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/dotiwisud_jometerux.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/bejagagilunof-kizafalanames-wulosesesizava.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/8537855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443588/normal_5fcb59d0592f8.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/didowugorokirug/brave_browser_tor_android.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/dejigupamowod.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/20658545924.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/desolation_wilderness_fishing_guide.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_off0000cb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB70 5364 bytes
SHA-256: b6969dcfbf34174322887d22b389498f94a0eb5352ad88f24a3c6e79b3da028b
font_01_sfnt_off0000ddc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC4 9620 bytes
SHA-256: f1b0b02df993deecfdc3fe2ec6722c80959d9d4d5a27f487ce15fb5a65e1f4e9