Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4ec6e3e21e8ce3…

MALICIOUS

PDF

58.1 KB Created: 2020-11-10 07:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 21eed34f43b9296ab6f520aced5dac04 SHA-1: e4c8e0976b7244e65bf88b846eb3284b30826730 SHA-256: 8f4ec6e3e21e8ce30e659e435c2ab35fb3753f83352590bc7494d959b21695fc
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'CISSP guide to security essentials answers'. The presence of a malicious redirector and a link farm indicates an attempt to direct users to potentially harmful content or malware.

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://traffking.ru/strik?keyword=cissp+guide+to+security+essentials+answers In PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/reziw-rarego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fa1a60db8166.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/866f9c6956dfb96.pdfIn PDF document text
    • https://gudojovevisepu.weebly.com/uploads/1/3/4/3/134314990/fopotuzarepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f8772e1e610c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f9e6e1ccbaa0.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/robumuduluwise/burnt_norton_ts_eliot.pdfIn PDF document text
    • https://s3.amazonaws.com/suzeduselu/resisting_cell_death_hallmark_means.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/84000090219.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/properties_of_exponents_review_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/byte_of_python_download.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_off0000aa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA49 5340 bytes
SHA-256: 0c7fd0b16d6a3ac75e07170fc68b6e8026f990ca757044d40d242dde2ebef9fa
font_01_sfnt_off0000bc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC99 9192 bytes
SHA-256: d22f5367f4bf010d28a02a5c59c6f24aae461273f1dc5311d6cb95efe2ce6b98

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