Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98276c1588ec551…

MALICIOUS

PDF

68.8 KB Created: 2021-02-10 18:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4ecdc2c3c849f653884ea8df46403d58 SHA-1: daa988866fa23857c425e0b358c335f37d9de75c SHA-256: f98276c1588ec551a4372f20963a629111e79641f807c6617f3f01d42bf47b18
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, with one specifically identified as a potential lure related to a 'tofu ice cream recipe'. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The presence of embedded URIs suggests an attempt to redirect the user to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=tofu+ice+cream+recipe PDF link annotation
    • http://leftoutclub.com/88087477264s235u.pdfIn PDF document text
    • http://magicwoolshop.com/solo_vpn_old_version_apk739kb.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/aiauWic/smart_and_final_turlock_application.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_602020f08e2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422645/normal_600b765e8494f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376870/normal_5fff2459da4f7.pdfIn PDF document text
    • http://tesar-krd.ru/41862199338eeul5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383137/normal_5fedf1a2cbe92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447658/normal_5ff658a3d73c7.pdfIn PDF document text
    • https://cdn.sqhk.co/purovufizu/0cicSie/hicarer_coin_capsules.pdfIn PDF document text
    • http://ig-copyrightviolation.com/blueant_bluetooth_n15417_manualdgmz6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_5fd7c28b0dada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fe613ada770e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379854/normal_5fe13df5a9ca4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5fe4b8089cdbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460980/normal_5fcc61890080d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 4900 bytes
SHA-256: 79f7188202c42cdcdd313f0d1038ac2a682fed110b04527189ad1ab47b42c79d
font_01_sfnt_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 10788 bytes
SHA-256: 6ce4d9ca5dcbc486d318d69b815e75362e37fc79b470885301503980472026c3

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