Malicious PDF — malware analysis report

Static analysis result for SHA-256 576f86531177f1a5…

MALICIOUS

PDF

99.9 KB Created: 2021-03-19 08:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fe20a3b82a6849e097d8ebe7b67fa8aa SHA-1: ef6bb9a60125547a75a7c7045f1247e6ead55a89 SHA-256: 576f86531177f1a5dd7361c4e241cf55eab690da2753d42848b7880164ef3fb6
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. Additionally, a machine learning classifier strongly flagged the PDF as malicious, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, contains text suggesting an urgency lure, which is a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://dafemum.ru/award?keyword=pl+sql+interview+questions+and+answers+for+experienced+pdf In PDF document text
    • http://nikoborekol.22web.org/mapreduce_in_python.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_603fe9f5ea631.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/clasificacion_de_bosniak_para_quistes_renales.pdfIn PDF document text
    • http://sudidukof.22web.org/ley_de_propiedad_en_condominio_2019_cdmx_word.pdfIn PDF document text
    • http://zefedupawomodos.22web.org/67611193220.pdfIn PDF document text
    • http://tenegijo.iblogger.org/26486441920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_603ab190666a8.pdfIn PDF document text
    • http://xepewifub.mygamesonline.org/5000w_audio_amplifier_circuit_diagram.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/bubisifapagefe/pukadepitogot.pdfIn PDF document text
    • http://fezadup.rf.gd/femekuvipidatuvebekaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/27243473372.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/flute_tone_tik_tok.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/89489555439.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/como_limpiar_un_sofa_de_tela_en_casa.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/how_to_get_learners_permit_in_south_carolina.pdfIn PDF document text
    • http://turomabubok.rf.gd/88945859026.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/kintex-_7_xc7k325t-_2ffg900c_datasheet.pdfIn PDF document text
    • http://rowagaparik.rf.gd/51544420201.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_off00014556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14556 5496 bytes
SHA-256: 9c646078df8cc63e1a07db5038a7003d4c3a6e543b5d4ac7c86973257d880007
font_01_sfnt_off0001582d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1582D 11780 bytes
SHA-256: 7d7626ba7d8b0f19153901539bc31ce9752dbbd03c2447227d61d9c1daa219f7

Open this report in the interactive analyzer, or submit your own file for analysis.