Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae852cc0f5a344e…

MALICIOUS

PDF

61.3 KB Created: 2020-11-11 02:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 2f866b7b144b29903d7d6ca031bcf79f SHA-1: cdb12f8a4b3b38e56a0ae5a04ab0b5601d7e35bd SHA-256: 2ae852cc0f5a344e1a7224b916b9f9408b51765b653235c8e1baa670bb49fed9
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://traffking.ru/aws?keyword=has+have+had+worksheets+2nd+grade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_5f9559be9ff01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5fab297dbfd74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393179/normal_5f942691a3b95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f9a418897d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426677/normal_5f9dd230f0452.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5f9cc9912ba3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f89383840104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f875f5c4f4da.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/186b2520351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f981b159f991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_5f9a910db8428.pdfIn PDF document text
    • https://jirukikemika.weebly.com/uploads/1/3/4/3/134310088/dd789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f89e0b0b3fd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f94f38694bc6.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/xakajoziwibi/new_york_state_regents_exams_2020_cancel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5baf2d2-fd61-4a99-9f0f-d0944f2f9112/reading_street_second_grade_resources.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/bonjour_tristesse.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_off0000b3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E8 5364 bytes
SHA-256: dc77683534a0af7e93cc708653b626ea1568be985d22858823be683313c60af9
font_01_sfnt_off0000c633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC633 9960 bytes
SHA-256: 6646f321d149a4a39570d8c8e1104d181861ec42d78560b92dec714bc8ace32f

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