Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec1dbd772ecfedb…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 18:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4f91914ef5b02941e4b68d60697b3ba5 SHA-1: 38cea1a346098b3aea1da85f60214c1b900989a2 SHA-256: eec1dbd772ecfedb4b0ed03d169cdc9cc1b21413767b910d6208e437964a3f43
136 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. The presence of a 'Password-protected archive handoff' heuristic suggests the document is a lure to trick users into downloading an encrypted payload. The embedded URL `https://jumiwimov.ru/award?keyword=acls+libro+del+proveedor+2020+pdf` is a strong indicator of a phishing or malware distribution attempt, aligning with the 'Spearphishing Attachment' technique. No scripts were extracted, but the overall structure and heuristics point to a downloader or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jumiwimov.ru/award?keyword=acls+libro+del+proveedor+2020+pdf PDF link annotation
    • https://gifolavetufo.weebly.com/uploads/1/3/2/6/132695571/1969960.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/jamesaxexosetuzanigi.pdfIn PDF document text
    • http://all-system7.xyz/can_i_sims_4_without_originr5riu.pdfIn PDF document text
    • http://austritkfa.com/pugonemowokafulogufililijo9jjz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_6016056ac5657.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/73741192600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500438/normal_604743bb03555.pdfIn PDF document text
    • https://nekegofoka.weebly.com/uploads/1/3/4/3/134364724/118b634a217f3.pdfIn PDF document text
    • http://grizhoff.ru/60338001787paeoq.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/76017984452.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/venn_diagram_questions.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/fixararololu/budget_spreadsheet_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/aoe_free_for_android.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/vuwuku.pdfIn PDF document text
    • http://bubezowi.epizy.com/ronuveve.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/what_cords_can_charge_a_ps3_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/how_do_i_connect_my_bose_cinemate_to_my_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/wudobudena.pdfIn PDF document text
    • http://xonotexeg.epizy.com/black_and_tan_brindle_wire_haired_dachshund.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/45500764382.pdfIn PDF document text
    • http://pirefalanife.epizy.com/the_new_case_for_gold_review.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_off0000e960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE960 5400 bytes
SHA-256: de340b1f18fa317ae09e79be62be9391f4e7b61bb80e7d9894abfa6d0fafbb6e
font_01_sfnt_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 11168 bytes
SHA-256: 7d9ff472a29ae5be42433e8973a7b9e7ba1adc33e7566ea9b3873b75601af2d3

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