Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bd6321cc1d92df…

MALICIOUS

PDF

60.9 KB Created: 2020-12-21 22:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5e52e68b6aba29153009fb94631c164a SHA-1: 917299b4c176b0d8f3fdf8df0a3d4b32818fb193 SHA-256: c2bd6321cc1d92dfb3227fb1a0cd0d4b93d5195a37cf69ee9e80bbccb712ab13
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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/strik?utm_term=eternium+gear+guide+bounty+hunter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5fb2f4aaa4606.pdfIn PDF document text
    • https://tigamapelexoka.weebly.com/uploads/1/3/4/6/134633170/4649f2d53c0.pdfIn PDF document text
    • https://kagepumesafoke.weebly.com/uploads/1/3/4/8/134846889/daxetupenawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_5fc09b15e2833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_5f9db4dfeba75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5fcae4dd7fff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469863/normal_5fbae1beef6be.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/bifamomove/fuximadanivapuwaduz.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/dibipovobakemego.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/pemofe.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/fluid_therapy_veterinary_guidelines.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_off0000b248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB248 5228 bytes
SHA-256: 59281bd84fd8b727c3a22574db100ca6e73622ee7e4385f1849e65c856531c1f
font_01_sfnt_off0000c3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3EE 10344 bytes
SHA-256: acf33c95f921c995439381cbdf6789ce86c86ec4b73c0a3ab49012aea10f4bcb

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