Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4c384653f3baa9…

MALICIOUS

PDF

310.6 KB Created: 2021-04-28 13:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ec8016ee15d3fb2f706478d4f043892d SHA-1: 0f8d4356469d4279a1ad88b7e238bb98f9ea4afc SHA-256: de4c384653f3baa98054dd00d2ca8d17f47d817c7bd097ad68b3f7329f316666
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 by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to "Sony str-dn1050 problems", suggesting a lure to entice clicks on the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9384

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://druttle.ru/strik?utm_term=sony+str-dn1050+problems PDF link annotation
    • https://cdn.sqhk.co/daribugubive/aEyrZgh/tik_tok_par_video_banane_wala_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/U4Xgfji/barure.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/jahjqji/dictionary_online_english_to_persian.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/0hjzfjb/92749778656.pdfIn PDF document text
    • http://antonio-ita.space/normas_apa_2019_descargar_gratisufi3u.pdfIn PDF document text
    • http://vorecan.space/27580295983mxko0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486054/normal_5fe56d46d38f6.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/lixafoxijo.pdfIn PDF document text
    • http://vorecan.fun/xixemisexowuna9zj.pdfIn PDF document text
    • http://axecheat1.xyz/vesunaxodif6npo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492250/normal_60007b0090bec.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/afro_american_symphony.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5fdfa85b277df.pdfIn PDF document text
    • http://effektzhizni.ru/sedaniperokebujetatouc9xm.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/iaoha3T/guborutupowu.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/airline_business_models.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://a9b72ff8-ed6f-4212-96c6-d467cc4e2332.filesusr.com/ugd/7f5649_f23b8e2a85034ecb96d0503d35f11f8d.pdf?index=trueIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_c9c86a50209c413da4fe02baa7adf0e9.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_35104c61557b459d958481541b0f6dbd.pdf?index=trueIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_34143d422b854eba8a24f495fed7362c.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_6884f818d5664607ba1f6847896da506.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_f5d26c96abf34af6bba4ce0110b14122.pdf?index=trueIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_c6f528eed5454a17a75581fedef6b51d.pdf?index=trueIn PDF document text
    • http://pofijiserige.onlinewebshop.net/17913007996.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/punctuation_worksheets_4th_grade.pdfIn PDF document text
    • https://36fde204-cda4-4268-899b-58717f9005d0.filesusr.com/ugd/b13063_10bda7333c0143ceb47840ba34c7f5fb.pdf?index=trueIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_bc6dd9eb086c4d6994329f2b99317526.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00047f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F17 5328 bytes
SHA-256: 6f4f60fe0e22822bdc097f98c4489ab1415428d1a3484567cb369db3aeeb24ea
font_01_sfnt_off0004912d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4912D 12792 bytes
SHA-256: ceb1c9cf59dc828fcf2d42ad2dd49648205e8ca1a74028710a4fb4079bf8739b
font_02_sfnt_off0004bcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCB1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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