Malicious PDF — malware analysis report

Static analysis result for SHA-256 b273390002bf1e66…

MALICIOUS

PDF

83.9 KB Created: 2020-11-25 16:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6b8418c72231f917f3fe425980dc3bea SHA-1: 1b20f7796976defa95218a018db13e7d8e759b85 SHA-256: b273390002bf1e665115dcd97aef3c8449c3858c82b25813093be3d039e339c1
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on services like Strikingly and Weebly. One of the primary links directs to a known malicious redirector. The document body is heavily obfuscated but contains references to 'Minecraft wither storm command', suggesting a lure to attract users to malicious content. The presence of numerous links and a malicious redirector indicates a phishing or scam attempt.

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=minecraft+wither+storm+command In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/3063209.pdfIn PDF document text
    • https://tipezigixak.weebly.com/uploads/1/3/4/3/134339593/suzofukilapud-nebijalogo.pdfIn PDF document text
    • https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/cb08407ea2.pdfIn PDF document text
    • https://nasinapalu.weebly.com/uploads/1/3/0/7/130739684/8703965.pdfIn PDF document text
    • https://suxamoka.weebly.com/uploads/1/3/4/8/134876373/d4a05d4c5f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ecb5521a-7281-447d-a8fa-f97657d23272/segakokifawiwaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52b1239-5333-4255-9494-ae2b7e69438b/55512571482.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb87954-0006-44a8-a85c-33fa09ee262a/doom_2016_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f211ec36-7adb-4b7b-833e-e4e843415b3a/tulotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc6d394-5f3b-4264-8c39-377bcaeb406d/jafidip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3ea1a9-4b5a-46d1-836d-f8253c1c5815/zemumok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91783ffe-69c1-43b4-81c2-72385f0c0224/7497584178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac097be4-c02c-4610-ab8c-e0cfc619bd08/xaxoxedo.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_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 5112 bytes
SHA-256: b3547b00d2c25d8067f94d4635fa4acfc5d7a4ceba3cbb76740e37d220deb29a
font_01_sfnt_off00010c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1A 12232 bytes
SHA-256: f40efdc7dd2ad7b3beeb33c6443c8df14e1edd6a145698d1f5244df5b1754db8
font_02_sfnt_off000134b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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