Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20a834c0b6ea3a4…

MALICIOUS

PDF

69.7 KB Created: 2020-12-22 05:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3f09dc76ac731bcbbeff6b2a19db5ce6 SHA-1: 52e43a8843fedd4f98501fa4df682d1fb4006f96 SHA-256: f20a834c0b6ea3a443fe672059c05a233d70259605bf5a9d39e6a5fbf5281c76
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=sarah+cynthia+sylvia+stout+poem+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f90a80936dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f9234fb86478.pdfIn PDF document text
    • https://vefigemeg.weebly.com/uploads/1/3/4/3/134368147/nawafigaxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448746/normal_5fcd381e1c787.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/kifuforawujok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_5fab0a7e8adb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_5fdb2a95e20a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_5fa8ff6c197ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_5fbc31373f15c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/332b7398-8fe1-4afe-9998-bfc67752ff43/childish_gambino_3005_mp3_download_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eabfbc1-3b7b-4742-8772-01674829cb44/80094880408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4327225-c3de-4e3d-b16d-fcd50516c33e/vector_word_problems_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a0ec2df-7144-475e-a1ff-b96d4a05c666/pexawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4903fd46-cf20-438b-a68a-8fc59beac97f/dekuxesovufaxada.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_off0000c63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63F 5540 bytes
SHA-256: 681926070a9596dbdbff7ffa1b99cfb0b189a8641f350671262032d024d92346
font_01_sfnt_off0000d8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E7 10120 bytes
SHA-256: 2201b2f524e48668a814484a105bf86114ba395db121afa0f9832d92b7452412
font_02_sfnt_off0000fb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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