Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66685b5fd1e2b2e…

MALICIOUS

PDF

71.8 KB Created: 2020-11-20 03:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 64ed33874d7a5621fe3673a5f00ef2a7 SHA-1: b925caee1b024a8f3814f56bb3a54528b33f588f SHA-256: c66685b5fd1e2b2e5c44ec3d97a4fca5db95de498c0c8ff5d9f683aec1b7a28d
214 Risk Score

Malware Insights

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

This PDF file was flagged 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, suggests a lure related to a 'game guide'. The presence of numerous external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=my+new+life+game+guide In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412889/normal_5fa4d05412460.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/9232432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5f97c08b35046.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/falufusu/jozodofupesebuv.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/jexapuposafi.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/sasajomo.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/pokemon_x_and_y_randomizer_rom_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/94169058907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e865192e-9288-4617-953e-0c142d1c52d9/zusek.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/38419441579.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD053 4844 bytes
SHA-256: b14d967d5d9fe4d666d0b9edf6f1daab7181b21a2e84642a9650fb3704fa2520
font_01_sfnt_off0000e0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C9 10400 bytes
SHA-256: 9ddafe392c522cbdf9ac4968d2f3605e16b271861722ea4d7de938fc4569f45b
font_02_sfnt_off0001041b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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