Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b07ffbbef059969…

MALICIOUS

PDF

72.2 KB Created: 2020-11-24 01:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 215b45549884f191b83ebc928c90acd3 SHA-1: 1dbc62aa1967ddb6415007aff33dfafed577517a SHA-256: 9b07ffbbef059969c56974c6355b475143099248deab5df51b96d7ec2c54b93c
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references that align with a lure for online content. The presence of numerous external PDF links, some pointing to potentially benign content and others to unknown or malicious sites, suggests an attempt to distribute further malicious content or phish for information. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffmen.ru/123?utm_term=wolf+of+wall+street+watch+online In PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/9521754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5fa24b3973c63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f94b3e140248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f9b251744820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_5fad8b6f18242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421049/normal_5faae8d7c49b3.pdfIn PDF document text
    • https://rosotomana.weebly.com/uploads/1/3/4/5/134585450/serupew.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/pusixa/bios_update_dell_inspiron_530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcaa728a-acb7-4875-a1ba-2f7ae6d1a9c4/stop_and_think_social_skills_workshe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4adf637-3c01-4139-8bc5-337e41faf16e/raiz_cuadrada_de_25.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cab3f84-a5c2-416d-9d0e-ef84aee127d2/physics_guided_neural_network.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e0e20ad-1a6d-4538-aedd-8e002f3bcf17/dedemutivaxukosewexi.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/65107464508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40d5f0a-3b2f-4f76-9ada-6409b897f659/nizugenujogiw.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_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 5076 bytes
SHA-256: 5a52afe6fcd95fea5e4a6d3a4d3fca0b99782ed78f09cdc5d137a31907766d7e
font_01_sfnt_off0000ee32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE32 11244 bytes
SHA-256: 5c47f1496d15fe09978aae3b095dc99a3ce8d7370909c10d52a1ddb0e0fa4162

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