Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9083487d81dbb7f…

MALICIOUS

PDF

74.6 KB Created: 2021-01-21 11:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 913b6853767f65c83c4c06ddfb9ac644 SHA-1: dffcfbd5239e8ad18775a3442b373d12532bb4b9 SHA-256: e9083487d81dbb7fb5cb7a08bc6aa3128e09f2ed4590f76b9a9f84c2c378fb43
96 Risk Score

Malware Insights

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

The PDF document uses a lure related to tent instructions to trick the user into clicking an embedded URL. This URL leads to another PDF, indicating a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=ozark+trail+13x10+dome+tent+instructions PDF link annotation
    • https://site-1174552.mozfiles.com/files/1174552/mebonumeze.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/Ujdryjj/santorini_greece_hotels_with_private_infinity_pool.pdfIn PDF document text
    • https://site-1177846.mozfiles.com/files/1177846/88972520038.pdfIn PDF document text
    • https://cdn.sqhk.co/defalevoruw/mhcagia/79046760992.pdfIn PDF document text
    • https://site-1178505.mozfiles.com/files/1178505/compromise_of_1850_map_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/if9gfrE/94238508266.pdfIn PDF document text
    • https://site-1192597.mozfiles.com/files/1192597/28677237519.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/UFdizjc/hori_tactical_assault_commander_pro_m2_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427094/normal_5fb43fdd57633.pdfIn PDF document text
    • https://site-1176433.mozfiles.com/files/1176433/grumpy_cat_movie_rotten_tomatoes.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/82jeicN/sijuwolilaxozese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466165/normal_5ff4562e54c8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5ffb253ed2820.pdfIn PDF document text
    • https://site-1258808.mozfiles.com/files/1258808/application_x-_www-_form-_urlencoded_or_json.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383805/normal_5fdd6131c3c05.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/penefelomiju/46796257143.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/bilagozanidasuledowege.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/cheque_received_receipt_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/pagafodejalozigivuxawi.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/rujimefem.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_off0000e5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CC 5652 bytes
SHA-256: 3ef2f7f69f66dd194b7166f81dff73cdc200dc2c3fb59c228c97d40948f3595a
font_01_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 10668 bytes
SHA-256: 52397890e82b675159ff7094a3db58b38d3bfd2f63d12065f0dee190d02fcfe6

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