Malicious PDF — malware analysis report

Static analysis result for SHA-256 c848f86c0ae473a7…

MALICIOUS

PDF

89.2 KB Created: 2021-02-25 02:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3130ce27c5668166ac885b1ca64c0e12 SHA-1: e7c76745e3482b2fcce101f1fdda4ad486a7ac14 SHA-256: c848f86c0ae473a7955f269919f24643f68e6ce1be1f3e628d746e22bb6214e6
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be related to the URL's pretext. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=survival+of+the+fittest+definition+simple PDF link annotation
    • http://svoytrylend.xyz/bumibipobujafozenoxhc9y.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/sony_str-dn1050_firmware_update.pdfIn PDF document text
    • https://cdn.sqhk.co/bepoweruga/eRNotjg/battlevoid_harbinger_best_weapons.pdfIn PDF document text
    • http://numulul.mygamesonline.org/best_james_patterson_book.pdfIn PDF document text
    • http://reduslim-ufficiale.website/the_human_centipede_full_movie_hdpx7ey.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/nakiliz.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/how_to_do_calligraphy_with_a_pencil_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomapagovujux.atwebpages.com/asus_x205ta_upgrade_ssd.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/nessun_dorma_translation_english.pdfIn PDF document text
    • http://mokineso.epizy.com/tukabipafev.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/dejetexipozapet.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/matatulusofamifevinewere.pdfIn PDF document text
    • http://mukoluduxoge.rf.gd/bedu_pako_baramasa_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/transunion_credit_bureau_reporting_codes.pdfIn PDF document text
    • http://tubujozuvos.epizy.com/nullification_crisis_worksheet.pdfIn PDF document text
    • http://kowotasube.epizy.com/surazojowemar.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/mowusoz.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/34002489432.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/lolunewirukibageke.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_off00010f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 3260 bytes
SHA-256: 00ce7fd3f7f9c8840a5577d2c9d112e222071feea3506d7c125dd3a51b8fb926
font_01_sfnt_off00011ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADA 5444 bytes
SHA-256: 129ff35a0cf26b03d7c447f68012eea4084b924e991f2194c2be69900bd17015
font_02_sfnt_off00012d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3D 12112 bytes
SHA-256: 61a5174c715ea6be4d3bc0ee0c56c2995d9e763389bd423b8b5e24692715dc08

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