Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04e53f1894b7a14…

MALICIOUS

PDF

82.8 KB Created: 2020-11-10 23:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 74e779b38d6f7d63c5494f1b844f0d65 SHA-1: 989bb4eab17b7793d1cf77f1ae4468f48d455333 SHA-256: d04e53f1894b7a141f35f5cdf9595edf7e0fcf8d651938c4870bfbb48d6665b4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, disguised as a link to an academic resource, is a common lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site, potentially for further exploitation or credential harvesting.

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://traffking.ru/123?keyword=foundations+of+macroeconomics+8th+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5fa0c86b384a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f90bc6fc18f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f89a43f5e433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_5faa4e4bef761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f886ade856a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f8b3a502a43c.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/9b258a92-0e6b-4fd8-87d6-9f652ddf3157/rerekenib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c73effd-fbc8-4b0f-a962-df9fb24f6bdb/google_free_website_creator.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/kudubetegixibozit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b277429e-fadc-4065-a97a-551db9d0d3f4/effective_practices_in_early_childhood_education_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/nursing_care_plan_for_postpartum_hemorrhage.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_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 5392 bytes
SHA-256: 18ac97362423a6deb3628ec2801406e3e75b1331987364f15c674a1c6d8bfa0c
font_01_sfnt_off000109d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D7 11260 bytes
SHA-256: 7081350a2f360945696e5ac277ceb516dcf69ccf0d76515c31d8fa9965f03b6c
font_02_sfnt_off00012fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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