Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5405aab1ff216e3…

MALICIOUS

PDF

74.6 KB Created: 2021-02-17 13:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6051267e205650d1d829221d65f5d80f SHA-1: faca8085f46dadf6e11416c417790137422e0d8e SHA-256: e5405aab1ff216e3d19bd6b3dce837cbaef1e8157ccdef3abc1fd85b6a8e1dda
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://seumenha.ru/wix?keyword=edenton+chowan+schools+board+of+education PDF link annotation
    • https://cdn.sqhk.co/tasiteregixo/khevhbl/10212882990.pdfIn PDF document text
    • http://skout.tech/masiwekijenulon7uwf9.pdfIn PDF document text
    • http://petersikdar.com/416877753461tu0q.pdfIn PDF document text
    • https://cdn.sqhk.co/guzikiku/NSNgjjL/suxefuven.pdfIn PDF document text
    • http://vosalax.22web.org/24708902864.pdfIn PDF document text
    • http://apelsins.space/psychology_in_action_12th_edition317sk.pdfIn PDF document text
    • http://ig-copyrightnotice.com/biziwunis1ab3.pdfIn PDF document text
    • http://rubeatyshop.xyz/nulupedutmki3n.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/fidobakipivogit/48570943044.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/agerigna_keyboard_free.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/varugojusegadunulu.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/bhojpuri_video_hd_ing_naya_gana.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/tivewirot.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/waziwoxelileruvilunijobom.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/98400038256.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/video_er_for_iphone_6s_2018.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/14048761292.pdfIn PDF document text
    • http://segudufarus.epizy.com/74079233352.pdfIn PDF document text
    • http://xuneviwek.epizy.com/30387924034.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_off0000e783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE783 5300 bytes
SHA-256: bdd19d047bd2235302a379c96b45bc69880fdebbc1e6c5db3ecb5cc5ccbaed2d
font_01_sfnt_off0000f995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF995 10412 bytes
SHA-256: f3f7dd14e29eed9c2559dc96f556d200a964ea6ac3ca67a587650cf9d01d3abe

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