Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b2f0c4ca371596…

MALICIOUS

PDF

69.3 KB Created: 2020-12-30 23:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d3ea299f23aa90d887072801f722578e SHA-1: bfd008c2b069ab12b0a02b08a403e6d7f2459f8c SHA-256: 26b2f0c4ca3715966984410e8a91cdaa164f304c9e768f68ce3b769bf46d338b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=sdg+goals+and+targets+nepal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f91ea6cd1fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_5f98c6b04e09c.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/geQjbA8/3203605703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481513/normal_5fbc3a55cb680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5fa10960b5637.pdfIn PDF document text
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/puxugija.pdfIn PDF document text
    • https://cdn.sqhk.co/punenekebi/jmgjcif/3205155964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459319/normal_5fe880683c337.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/sadesiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476930/normal_5fd1b7b83f0aa.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/nerugiraxura/windows_98_product_key_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7b3512-23cd-4745-a1b4-b170f8b1541b/xavenufogeti.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_off0000d134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD134 5228 bytes
SHA-256: 0fb94edd233be9a2d9f754bd28b8511ae1550e2213948dab69389ecdcf417b32
font_01_sfnt_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 10836 bytes
SHA-256: 8dd1327f620e513415fd598e6d732c676663a693e9027236972910e62300523b

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