Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8de1456d21a5dcc…

MALICIOUS

PDF

75.3 KB Created: 2021-02-25 06:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 35e9dcdd520e8f9508f61fc8b2ce4d00 SHA-1: 2edf9f39091d4aa69a33349b532419796eb10848 SHA-256: c8de1456d21a5dcc98678633ca44e50d616f4ddd73910a8a4ada4b1a61290f1d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a health-related lure to entice users to click the malicious link.

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://crophysi.ru/strik?utm_term=is+high+blood+pressure+dangerous+during+pregnancy PDF link annotation
    • http://loduwij.scienceontheweb.net/guramebuxadosodipowutu.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/ijpMFig/kejelukefuperemuv.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/fuzis.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/CRhipA3/smart_assistant_realme_download.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/goviwutemafutiluvot.pdfIn PDF document text
    • http://trendmobile.ru/kool_and_the_gang_too_hotgi8y1.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/gumegulaxi/sotegipuzolopidow.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/where_is_the_reset_button_on_my_samsung_refrigerator_ice_maker.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/joniva.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/entry_level_hr_cover_letter_template.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/what_is_the_best_book_for_gre_prep.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/99_construction_guide_osrs_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/99559795700.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/12330746796.pdfIn PDF document text
    • http://pujumek.myartsonline.com/xofanawif.pdfIn PDF document text
    • http://gafodix.myartsonline.com/xinisojusakomagotolugo.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/xupepogasobazitosofaxis.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/bisi_alawiye_live_performance.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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 2952 bytes
SHA-256: c2f56268a566df113ea8d29fca174347cb93d232f4171da6c777a0030a56deed
font_01_sfnt_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 5512 bytes
SHA-256: 928912315df1d4d4a64adf54be1d31cbe5ad3709db42673552957a2daf833cc8
font_02_sfnt_off0000fb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4B 10672 bytes
SHA-256: e53175ccd230d20cea0dd54b374072788634d4c4d4c5a40bbdd666fafa3568f1

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