Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd48e4536c56468…

MALICIOUS

PDF

67.5 KB Created: 2020-11-26 04:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b4d793bb347e6b53814b273dd54fede7 SHA-1: d6335d70846c95616a281b1667068715993b89d6 SHA-256: 6bd48e4536c56468bc1267531e13e64cfa2c9a19d4d19833a03695b7add83caf
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=eye+and+brain+connection PDF link annotation
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/juworufaketeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5f9147ada918f.pdfIn PDF document text
    • https://siradukezud.weebly.com/uploads/1/3/4/7/134711866/5712b5331515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_5fa49173a8278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_5faf4aece94e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f926df37f70e.pdfIn PDF document text
    • https://degodowaserujes.weebly.com/uploads/1/3/4/4/134494515/zugeduzamisef_kowelekupirag_nezavonaki.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/muvarelo/3.5_frostburn.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/bapolifiwalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f33de1-c61c-4f19-a23e-133b5a5146ab/71998472326.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/article_35a_constitution_of_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4abc192a-6b2c-4c97-b7c9-14dfee9cad6a/lomotif_apk_download_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/93956822813.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/greensleeves_sheet_music_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/fatedugevul.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/guillermo_cabral_lassalle.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_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 4924 bytes
SHA-256: 11a2c79d40e8d830d957f412c4a0ab4d49936da130421aa18438c7243af6a764
font_01_sfnt_off0000de49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE49 10280 bytes
SHA-256: 16d988ba225846ecacf6fa3dac0cdf3edbbf2b4f9c7b98f1f3846d5f54871c05

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