Malicious PDF — malware analysis report

Static analysis result for SHA-256 083038a776d7597e…

MALICIOUS

PDF

97.4 KB Created: 2021-01-21 13:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4ddc4cb4c41ea769895796ba615df16f SHA-1: 74e567219cf169197e5ffb043b1fdde98508a51b SHA-256: 083038a776d7597e84912d4ab216b46dc70e837113e42e053c2d3b7ab3e4f1a0
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to 'trafftec.ru', which is highly suspicious given the context of a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site. No scripts were extracted, but the presence of a malicious URI in a document disguised as educational material is a clear indicator of a phishing attack.

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://trafftec.ru/123?utm_term=flocabulary+unit+4+answer+key+6th+grade PDF link annotation
    • http://vasazuruxu.iblogger.org/juligazaxuvejam.pdfIn PDF document text
    • http://waniwidolo.66ghz.com/dragon_age_jammer_s_stash_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kitalanexu.epizy.com/flip_flop_template_printable_free.pdfIn PDF document text
    • http://xinudigiwuwa.epizy.com/rpvv_class_11th_admission_form_2018.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/15417281037.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/autocad_2015_activation_code_free.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/57216626103.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/dell_optiplex_7050_tower_desktop_computer_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/53363548147.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/ccma_dispute_referral_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/bms_full_form_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/mariam_khan_reporting_live_serial_cast_name.pdfIn PDF document text
    • http://pejibuturu.epizy.com/disubanudovekikexu.pdfIn PDF document text
    • http://giwofigu.epizy.com/sesibujip.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/epilepsy_treatment_guidelines_australia.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E8 5796 bytes
SHA-256: dfffa192dabeb49560c2ad7e571881efa7343e51f76c9e1f584d56a2adddb06f
font_01_sfnt_off00013abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABF 11544 bytes
SHA-256: 2dbaa286e719ff4f2e3cbc01c4ffaf1072a54aa818fa4be15cd3831e20386603
font_02_sfnt_off00016265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16265 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189

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