Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d86684dbe28ab1…

MALICIOUS

PDF

197.9 KB Created: 2021-06-05 21:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 700b26b64fc0a957dcab97bc140c528d SHA-1: c5666cd999f01f8dbb1f6eab6e8353c934e92077 SHA-256: f4d86684dbe28ab1b8b61b67cab46fd573068b63f88830d6a7275ff044240b3c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/pbw?utm_term=linux+os+android+apps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471109/normal_60402fac0cfed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_605942e2988e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383149/normal_5ffa085e1a50d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458634/normal_6034eeede36c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406482/normal_5fce85ad19ad1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427268/normal_5fd9e70bbb4f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423728/normal_60437b5e33547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383571/normal_603d3f1f49b56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5fe5afa8d90a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_60ba034a22129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_6042cfa9f111f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469128/normal_60584aa4a0a2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144669243/809872178.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144415146/what_is_the_greatest_musical_performance_of_all_time.pdfIn PDF document text
    • http://lopasexosew.pbworks.com/w/file/fetch/144665712/34441393094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b04a23-5a78-499b-900d-27517bdd2f41/nanotarijov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859ee6fb-e2a7-410e-af9d-94fe38fd9c12/wonderwall_projector_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3148f17a-48d4-4047-a24f-80cd779140a2/84320421608.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144423006/how_to_end_an_intercessory_prayer.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_off0002d2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2FD 4932 bytes
SHA-256: e1f35ce77366c35d53f8278e7918907e27f24f074c9c7ca239c41f4c68b98cb3
font_01_sfnt_off0002e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3D7 10652 bytes
SHA-256: f055c35b8065fb7b78a60305d3219e0b5eb7e5fdb1afd24634c02280f6832836

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