Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bcf432528ca497…

MALICIOUS

PDF

87.0 KB Created: 2021-03-28 16:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0993d0c7acb3d5c5fe1d240a0e3f11ab SHA-1: 35511beaacab4b00fbdc07e46f32482dd3d2a762 SHA-256: f6bcf432528ca4974e38f68573e3b40bcf66506acbbae543ef39314370bc94d5
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 0.9997

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://kuzutuzo.ru/123?utm_term=abdominales+ejercicios+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494166/normal_605e0efe5a4fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_60547260884ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457838/normal_600310ba01ccd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414331/normal_604e64c5260dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470826/normal_600655a93235e.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/tekagojuguruxose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448100/normal_601404f1235e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_60242d1ac06cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_603c09388beb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450047/normal_5ff71b9dd66f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_601b3efbe41b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_603df1ffa2efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474211/normal_6042f1112ca4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_602fd874934c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5fdc2086eb31e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_604e9e03794de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375690/normal_5feccc67058d5.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/lixisariwulo/45434741569.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/fusedepigigawi.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_off00010b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4A 5504 bytes
SHA-256: a4757ef6ef908a6269764a75244b02c6fb530a2653de6f5be355da4cf79234f8
font_01_sfnt_off00011ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDD 2116 bytes
SHA-256: c0b080a3303b8e939d585112c399c02879d5f0d732e84daf845a916286948345
font_02_sfnt_off00012789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12789 11836 bytes
SHA-256: bf0eb450a16af8892c8957b2d0543cd3fbe6c8ac3a6f0b7fcf2bed4cd6d98956

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