Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e37f3646ca1d507…

MALICIOUS

PDF

72.0 KB Created: 2021-03-31 06:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: acd69a53b80a008d5338283924798310 SHA-1: 607980b7045c13ad3688b7259140d7fe5c72d4c8 SHA-256: 3e37f3646ca1d507d0f3fec8cf862e94ec4e860dd738dc73d3be83feb9e91e23
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/award?keyword=algebra+1+common+core+answer+key+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403804/normal_604816eb93eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_6049703db98af.pdfIn PDF document text
    • https://sefagovat.weebly.com/uploads/1/3/4/4/134402874/3024223.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/remobaremajurolet.pdfIn PDF document text
    • https://pifabesi.weebly.com/uploads/1/3/5/9/135958575/gimux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481418/normal_6059f96a70c08.pdfIn PDF document text
    • https://zewerigavuj.weebly.com/uploads/1/3/2/6/132681779/ea74950d.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/56124847842.pdfIn PDF document text
    • http://baby-slings.ru/odd_vs_b_xb65b2.pdfIn PDF document text
    • https://bifugojatomawak.weebly.com/uploads/1/3/1/4/131437093/9215108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_5fe869e826f32.pdfIn PDF document text
    • http://lasleymarkt.ru/jefabupewixogajisoohxqe.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/libure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463830/normal_5fcc7fae2098d.pdfIn PDF document text
    • http://changely.club/31442229346ab97q.pdfIn PDF document text
    • http://latitekiwa.scienceontheweb.net/wipeziluwedanebupesuxotut.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/bulikowexunepov/80979230148.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/7189708587.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_03138ec4e2f84a1da854f627b0f00258.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/new_milford_ct_weather_report.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_b9ba002cb4394e6e84dec1c174fc04e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/bezadedadakuwovib.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/non_verbal_reasoning_test_2_answer.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_79e80312181c462c9e2b8b6f0e954d28.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_5d38298b4a16429caff0c07f75f5fe35.pdf?index=trueIn 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_off0000da49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA49 5912 bytes
SHA-256: 7a668db5f1a48cd853e34a841fcc067f6b56119210cc23fbc74abba93ca97f57
font_01_sfnt_off0000ee77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 10424 bytes
SHA-256: 57390c294eb51bd3690ee4a7a5c7f58a84bd4b0990be4c824b844f631fab95c4

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