Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b963a2fec8ee4e6…

MALICIOUS

PDF

78.5 KB Created: 2021-02-25 07:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 592e421cdb16ebb48333350f150dbb0d SHA-1: 3b850342c00bfa13cd5cc5e3943a8e6006c13ed5 SHA-256: 8b963a2fec8ee4e6789a819e42a8ab0521e100f2310eb8923b5e391b350a81dc
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used to host a phishing page or malware. The document body, though heavily obfuscated, suggests a lure related to 'kenmore water softener'. No scripts were extracted, but the presence of embedded URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

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://jottigo.ru/strik?utm_term=how+often+should+my+kenmore+water+softener+regenerate PDF link annotation
    • http://vowujebotoza.mywebcommunity.org/best_selling_anger_management_books.pdfIn PDF document text
    • http://cashbackmoney.info/pdf_to_dwg_online_no_emailqqgli.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/hiichiD/lipasupafagoka.pdfIn PDF document text
    • http://giveaway2020.info/unlock_iphone_4s_freev1w9a.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/11092793683.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/diary_of_a_wimpy_kid_9_read_online_free.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/bededuxotulapil/toluk.pdfIn PDF document text
    • http://turijebudeta.rf.gd/bureaucrats_hitchhiker_s_guide_galaxy.pdfIn PDF document text
    • http://kutezowifemiwe.epizy.com/edible_oil_industry_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/dalolevidik.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/dell_5285_wont_turn_on.pdfIn PDF document text
    • http://pokuzanu.epizy.com/duzanoxenoxisa.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/you_re_so_vain_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/add_data_in_excel_sheet_using_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/cleric_multiclass_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/video_editor_trimmer_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57D 5540 bytes
SHA-256: 6cd30cd3e8f5c97b279301b35c03c62d630e7decc4f2823e6007d36f8ccc8858
font_01_sfnt_off00010844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10844 10540 bytes
SHA-256: cc1e28c266a3f0305db807a1d84e6a9734704d3857a5070c3b9d4d8eb3d77ef6

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