Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7123d7334280dcb…

MALICIOUS

PDF

82.3 KB Created: 2021-04-07 21:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 25da9a125ae4cf56985854e545c3ca12 SHA-1: d7f419c04fe517b0abbf9020507bc3d0bd83bfa2 SHA-256: b7123d7334280dcb7450f52982bfe58eee5ca40c48a926030b3546a4da5bee23
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'midufefew.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Ikea hemnes twin bed assembly instructions', a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/aws?utm_term=ikea+hemnes+twin+bed+assembly+instructions PDF link annotation
    • http://tevituvodejifep.mywebcommunity.org/kizuzapexega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_60594ab5e1401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500001/normal_5ff345ff156c4.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/animation_the_global_history.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/67345592881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fd1f7c8819db.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/vutazexevoredosi.pdfIn PDF document text
    • http://jamosaxomexe.iblogger.org/damidojetasuwukejegujenup.pdfIn PDF document text
    • http://rofuzixaveminup.iblogger.org/suvifakoremonodejavup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459326/normal_6056b7026ffe4.pdfIn PDF document text
    • http://zefefiwova.medianewsonline.com/mastering_elliott_wave.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/angina_types.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vegunag.rf.gd/9186312833.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/83186530554.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/lands_end_return_policy_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/53330986527.pdfIn PDF document text
    • http://wetusadesaxoni.rf.gd/blank_movie_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/40241224006.pdfIn PDF document text
    • http://sajidot.epizy.com/budoloxasuputeselawe.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/contract_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/62766315313.pdfIn PDF document text
    • http://sewujajapivix.onlinewebshop.net/what_is_event_in_itil_v3.pdfIn PDF document text
    • http://xufolat.atwebpages.com/34567573015.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/kibetebusejuv.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_off0000f51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51B 4092 bytes
SHA-256: 3f8bc25f4d86f3df679b4f955c3715c9fbe0f7378d243d3e974ee2099584ad76
font_01_sfnt_off000103b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 5516 bytes
SHA-256: 072e65fc21c5330115a55535355f2ebe8853a844f4f6780a22a18dbb74e9a945
font_02_sfnt_off00011664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11664 10612 bytes
SHA-256: f0a00990cfc6b9c46a21d8916ff94db761be93f31ba42052b563bac74e0eadec

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