Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c2aaa636d942ca…

MALICIOUS

PDF

68.0 KB Created: 2020-11-26 15:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 63ee3bc18d52da9240ae0b099d45c7ee SHA-1: d1d78bef3c98cd41c926543be82152344d5f7eb4 SHA-256: f5c2aaa636d942cabe45695836919a7df02fe0742a21b53d40971dab745ed2c5
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 0.9998

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://traffset.ru/aws?utm_term=problem+solving+in+math+division+with+answer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5f939b067d0bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_5fbf5df4b0108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381091/normal_5f9494ec67183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5f8f75fdd411d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5f9d53b57368a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fa330be93049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8e4f3f94e83.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/lorifumofelu/farmers_jacksonville_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a73eb9-ccc3-4879-a1c5-2617ff2879f4/happy_new_year_songs_downloads.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/arma_3_altis_life_free.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/gowaxazekevukezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae44d72-2f33-4ad9-82db-ab1aa329cc04/82682337993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8630c910-85a7-4a43-977d-9ff9afb43039/742833070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fefbd21-9429-49cc-8a6d-c672c85ba889/japonelinowoguzasuzidi.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_off0000ca93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA93 5532 bytes
SHA-256: 8376652f6d6a09011ddf22cacd33798324c0967328ad6a028bf0d2d9f488440c
font_01_sfnt_off0000dd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD44 11176 bytes
SHA-256: aa486e39fed0b2e4721bbdc09def8ff63a2a0417731a6ff6750b837985dabdac

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