Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc5c4183f25f8de…

MALICIOUS

PDF

76.4 KB Created: 2021-05-22 01:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d8d68839623c7d11138be52a0a71f6bd SHA-1: 231315af914a0b63492091b382347e55a0c8b0e3 SHA-256: afc5c4183f25f8de58271068aaa90a73f5a9263f4a7fb1c285c1a427c6ea7289
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to link farms and potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The document body, though heavily obfuscated, suggests a lure related to Minecraft, likely to trick users into visiting malicious sites. ClamAV also detected this as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=how+to+add+texture+pack+to+minecraft+java+1.16.4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453329/normal_5ff686a751e3c.pdfIn PDF document text
    • https://tifogufa.weebly.com/uploads/1/3/1/6/131637606/5646483.pdfIn PDF document text
    • https://pesefusuf.weebly.com/uploads/1/3/4/4/134486856/1ac66db60902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463264/normal_600525f3a3f46.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/kinawamozikuwosis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_6059500f202fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_600b3f500e8cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369308/normal_5fe35087786fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5ff3c5d81b828.pdfIn PDF document text
    • https://pugewolusaw.weebly.com/uploads/1/3/1/4/131453132/c666c4f11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_6046abd919ec5.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/sumesawoxajew/85254307579.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/19099391366.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/2723278540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9cb02f1-5de3-44bb-87e5-ba6c048d5b2b/lofate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee0c476-f851-4544-ae54-087e61ba7ace/what_is_punctuated_equilibrium.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e10813-e4a3-4540-9630-35ae2fde6963/85797847494.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/chrome_76_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/varafeviv.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/60474093990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1a486c-05bd-4918-9cad-30fb5982565d/84960958041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a32582-72b6-44a1-9c99-99094203d6a9/gunumotonisujigofulebep.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_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5740 bytes
SHA-256: d1d5058fe6fd194ed29782de2c03cc0ab821d2d1e6ab533e5bc14529e041c612
font_01_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 10764 bytes
SHA-256: a6049d8cc7580ccd9790079cf46b90a487c174bc648e53bef1485ca877f0c728

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