Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0543a033a8c7879…

MALICIOUS

PDF

94.6 KB Created: 2021-02-11 12:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a25a46d45a377ab6f57021d20464906b SHA-1: 730f7d9815bfa5aeeee8e383a38210ca25d662d7 SHA-256: d0543a033a8c7879f9d595388b9995e3e0c6cf5b744a1192c9b1d0306260c582
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of an external URI pointing to 'jottigo.ru' suggests a phishing or malware distribution attempt. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction with the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=rendering+in+pen+and+ink+guptill+pdf
    • http://jobopenufa.iblogger.org/kizabuwapatixenes.pdf
    • http://wimazosuwoxugij.66ghz.com/ebook_cookbook_template.pdf
    • http://verifybadgesbusiness.com/mamekunuwepusozarosija6j73h.pdf
    • https://cdn-cms.f-static.net/uploads/4408703/normal_601e3d691b53a.pdf
    • http://bepebeku.22web.org/answer_to_how_are_you_question.pdf
    • https://cdn-cms.f-static.net/uploads/4483851/normal_600ccd07a991d.pdf
    • https://cdn-cms.f-static.net/uploads/4489422/normal_60248c49e3b58.pdf
    • http://tubudemawaxoki.iblogger.org/is_there_a_spreadsheet_program_for_ipad.pdf
    • http://habercigo.com/33403940680zyvu0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zeledevunetoxow.rf.gd/difference_between_gaap_and_ifrs_balance_sheet.pdf
    • https://s3.amazonaws.com/tawovojo/39389956734.pdf
    • http://detuzojezil.rf.gd/kose_vitamin_c_sheet_mask_review.pdf
    • https://s3.amazonaws.com/warapagefasovi/75471963826.pdf
    • https://s3.amazonaws.com/bifadiwuwileji/59340800898.pdf
    • http://tojederetesez.epizy.com/big_data_platform_ibm.pdf
    • https://s3.amazonaws.com/jirebonudur/accounting_rules_and_guidelines.pdf
    • https://s3.amazonaws.com/tibanepoxilibud/devaretinomuvupejez.pdf
    • http://dadosekim.epizy.com/amt_tax_reform_individual.pdf
    • https://s3.amazonaws.com/kodipopujufipig/best_alliance_leveling_guide_classic_wow_reddit.pdf
    • http://navibizo.rf.gd/volobalurodig.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127c2.bin
842e598f47d8ee531b4fccaf02ea84aaf20f937ecc51e9271eb0fd72aa2fdea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127C2 4876 bytes
font_01_sfnt_off00013865.bin
1600c1f842da9cc0ed3c44d73e56f0ddcfbf751cccecec9dfe6b8a95249c2b25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13865 11280 bytes
font_02_sfnt_off00015ec0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC0 4324 bytes

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