Malicious PDF — malware analysis report

Static analysis result for SHA-256 af365c97b3a7683d…

MALICIOUS

PDF

62.3 KB Created: 2020-12-17 10:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fc30d75589790260c2e86961109e7b42 SHA-1: 9c1a95e623fb7525d50cc6d1b75e645d5c3896fe SHA-256: af365c97b3a7683d9d764b118401dbc0105aee1ed7247b872735b7eb92ee692b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to a school principal, suggesting a targeted lure. The presence of numerous external PDF links indicates a link farm or redirection strategy to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=cedar+springs+high+school+principal In PDF document text
    • https://tomojuvugitem.weebly.com/uploads/1/3/4/4/134475437/9336573.pdfIn PDF document text
    • https://fipuvulozubonoj.weebly.com/uploads/1/3/4/3/134313175/rukadap_zewefisi.pdfIn PDF document text
    • https://vezuwuzasulibe.weebly.com/uploads/1/3/4/3/134354720/8951607.pdfIn PDF document text
    • https://juzukixidud.weebly.com/uploads/1/3/4/4/134453884/xuwexapel.pdfIn PDF document text
    • https://dililoperajat.weebly.com/uploads/1/3/4/6/134631443/1be3e980ab6c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fb6f1f7ecde0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5fd6d8ef7368e.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/vinejivunitego/97305116375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ab27d8-3733-4882-b15c-8c5d1765309b/estudio_del_trabajo_2.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/85677619713.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/section_1151_va.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/chaminade_report_card_portal.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/blackpink_songs_video.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_off0000b821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB821 5240 bytes
SHA-256: eac46c6e0f454ccd1ae62f394cc98c2038ee2b334302c2f1f8c716f29414f4c2
font_01_sfnt_off0000c9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EA 10152 bytes
SHA-256: f6a9390af89070112a9b7c3457a24d19a5b6462463388464a699e97262ff932a

Open this report in the interactive analyzer, or submit your own file for analysis.