Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d464678248570c…

MALICIOUS

PDF

72.0 KB Created: 2020-11-12 15:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3bd9900942b385f6d19234c3a6426767 SHA-1: 9595da8c6db8f97ef53ff785ea72bd7391a4d1d5 SHA-256: c9d464678248570c80df0de6a78bfa826909bbcdc99e2e8824ca91b072d39faf
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate malicious intent. While no scripts were directly extracted, the nature of the links suggests an attempt to redirect users to phishing or malware distribution sites.

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://traffmen.ru/strik?utm_term=gang+plank+galleon In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f8935f6db7f4.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/wuxomewutefu-leferul-jojimon-veliseg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f998f063df11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384316/normal_5f912e7065b2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f944321e5fb3.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/a18867db-aa85-4899-b164-9846c130934a/audio_recordings_of_bigfoot.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/ballaststoffreiche_lebensmittel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a2bdda-368a-48d9-bb96-af4e2028177b/wenofeposuliz.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/surf_city_elementary_school_principal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6156fcc-0d9d-4d50-a069-d05081d35909/3723986860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d083c190-4945-452f-b97a-d89446f04b19/68424338999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917ba456-7288-446c-8b34-aba701885a13/demubur.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_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 3740 bytes
SHA-256: f5b5b544d5fd4abf6beecfca922c2a50094820c598ba736ac59d0e4eb2a8bdaa
font_01_sfnt_off0000de97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE97 4808 bytes
SHA-256: b24549e3848dc36c29b1af4f43f118949473dd41c2e9e722a8185e571ffb2609
font_02_sfnt_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 10696 bytes
SHA-256: ca70858d56fabf2b0c0cb94ba9c6bf68aa6812d3078bd965c4a9ee82db9e2077

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