Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa7fe85e26a7edc3…

MALICIOUS

PDF

75.0 KB Created: 2020-11-18 04:49:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: cc23346608c1b8ea10aa8eee965d1679 SHA-1: 1807e7f5dc35806e7805642dc4866fb0a46211e6 SHA-256: aa7fe85e26a7edc39348b4caedd5a477305ea2cb724a27077e3249dd1c152e8b
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external PDF links suggest a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/strik?utm_term=we+are+the+ants In PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5fa1c0663b9cc.pdfIn PDF document text
    • https://dunefofitibo.weebly.com/uploads/1/3/4/6/134608320/767ff2c2a3856.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/liguwubore/4671570836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154168f0-1035-4728-8e89-c15a2400c72e/wugozibaxakakutixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca6931a-6583-4e74-91f0-133fa2a71ae4/4806283052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/569fc0e9-95f6-4d5d-be9f-10a1bc529948/pevasibodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53469b39-1e50-4465-85ae-8b6bd0ff2187/70320935129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdbecf6-341c-45e7-b0ce-e622f46ba262/brave_frontier_unit_list.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/87451930470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd379a2-a4fa-438a-a50b-802c30a44e60/sumixef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2a071e-5412-4bf7-a8b7-256316825c62/mojamelasojuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221de91a-eb2b-4fd8-8c75-456f2766399b/wojolasizenoxux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d02bd8-dd48-475d-96c7-d90468b70006/dj_lobo_music_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_off0000eb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB40 4756 bytes
SHA-256: 5ae6a169da18022ab20a4a159e7b4150ce1ca200c989fe6c3afb94e832774531
font_01_sfnt_off0000fb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6C 10548 bytes
SHA-256: 5b6cd13c7efcf70075abdeab0b394447ca4d5646b1ae05892e4f3c5c203329ec

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