Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fcc4fb7c0a3965…

MALICIOUS

PDF

68.1 KB Created: 2020-11-25 20:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 79e2bb7945f2d7f00ac71715d643815a SHA-1: 78affba6d3cdb412d816283a5188480b37353bad SHA-256: 27fcc4fb7c0a39658a4d3b3d2695fb5bbb5faa6ea56120aad9fd2876379da4bc
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one critical heuristic identifying it as a redirector link to known malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick users into visiting malicious 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
  • 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://traffine.ru/123?utm_term=fun+facts+about+georgia In PDF document text
    • https://nutolifawivu.weebly.com/uploads/1/3/1/4/131437776/muligito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f899b6fd42bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5fa6d95072f26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd11ccf-7260-4ce8-b806-7908e7e447f4/pompones_para_porristas_en_monterrey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc8ef25-b3b5-4357-90cf-c21f78a3fb3a/wobobizovasujuselegabik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0f420d-5371-46de-a86e-1d44ba90ba6e/warframe_eso_builds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff369a0d-6d64-46f6-a3a9-5fa8f315ed0b/94015049550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def0e39f-021a-421f-bc2d-b3fabe2addd2/pharmacology_hesi_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216d2927-db45-443c-846b-5eb8ea33149b/glencoe_geometry_chapter_8_test_form_2d_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/kaxumumu.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/mitochondrial_disease_gene_therapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dcb336a-fb72-42e7-9374-21299707be95/contemporary_direct_and_interactive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57398cf4-292c-45fe-a46a-ad6737922238/4596901714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb11bde-3e89-4a67-960e-cdc4c91a9b18/57154543069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0c1a51-b4c2-4f90-a8bb-fc531deb065b/wibekivafipopikebozo.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_off0000ced2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED2 5112 bytes
SHA-256: 5584e0a09b01d6836b0ab5e2ba5f127d518b79a4634a2b6dd96a387e048a9c2f
font_01_sfnt_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 10396 bytes
SHA-256: de9516519636f9a54de9fef42371be9a6deba3930907051bcde2a6d5c484ccc8

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