Malicious PDF — malware analysis report

Static analysis result for SHA-256 92187eb2907f95b4…

MALICIOUS

PDF

78.0 KB Created: 2021-06-04 06:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b02dfde2c60c6f97ac88a0ab5ab9bae8 SHA-1: b4363e1d316bd6321de13db57aafd15d6d937af6 SHA-256: 92187eb2907f95b44eb70515ecb9d685cdc653472ee6673ca51d8da5f7a2c7d1
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 0.9991

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://fokemale.ru/123?utm_term=ambient+air+sampling+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425916/normal_604e210ad991d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418000/normal_60035662254e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498983/normal_603e360f25f94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_6041a8fca2086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486997/normal_603a8609499fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449992/normal_6033d681e4a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470523/normal_60b856c84b6d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_6054dc1db1757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446017/normal_6038b68fb6ff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_60633bc13a6ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_605f29feecf86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_60304412cdf8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453914/normal_5fe2ec4eda0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_603e0f36e7ba3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401525/normal_5ff196e081f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_60406a118c1eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379854/normal_5fe13dd876c46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484623/normal_60173747056af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fec08f04aa69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_605c0bbdc18ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_6029a70bd789c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485810/normal_5fcedd72a2e20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pudamalulera.pbworks.com/w/file/fetch/144546987/32440008571.pdfIn PDF document text
    • http://rabopadob.pbworks.com/f/houston_chat_line_numbers.pdfIn PDF document text
    • http://ronefete.pbworks.com/f/how_to_charge_welch_allyn_otoscope_battery.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_off0000f111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 5492 bytes
SHA-256: e5a3b12a5b5e842c799fd34d597668fd85f2568a1a9edd976a3d0874145ec441
font_01_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 11500 bytes
SHA-256: 8d88fa96d70367d19bf13d6fe9913d55984eae667b61d8fe9ed6f5dc54ae838f

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