Malicious PDF — malware analysis report

Static analysis result for SHA-256 53505e5c18d51d7f…

MALICIOUS

PDF

72.5 KB Created: 2020-12-22 22:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8265e72bcec83e2bb0f191e200243162 SHA-1: 64621fdc1472c7fea7aefa6da6d34930a472177c SHA-256: 53505e5c18d51d7fec62461fa39c40f9112dab88f94b5ee1f4bca0e802a04f14
136 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate a payment redirection lure, suggesting the document aims to trick users into believing there are changes to financial instructions. The embedded URL `https://traffset.ru/strik?utm_term=guideline+401+k+fees` likely leads to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://traffset.ru/strik?utm_term=guideline+401+k+fees PDF link annotation
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/vuluzarik-nunakaf-tejapirofog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_5fbf59dcbbc46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5fa1c1e46abba.pdfIn PDF document text
    • https://wudumimimi.weebly.com/uploads/1/3/4/3/134356267/5961973.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/jatidumobij_xitanunut_gokebudu.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/2336912.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a421f97b-e33e-414d-94db-da9b2ea02569/19068184535.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdec0a62dcd53187f2068e5/t/5fdf12f8f5f642265655de5c/1608454904659/smok_nord_manual_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59ef75bcb0228a2a2afad/t/5fc67c44fa04221c710080dc/1606843460976/piano_video_lessons_year_1.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d3b00b6b03258f353712/t/5fc4e726bc819f1cf4727e51/1606739751716/wulowolatimoxorasamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f95ef08-10fb-4511-95f7-b9e9ce3af463/39141066177.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C0 4972 bytes
SHA-256: 095e6a2ab48b857da899088afda7bc93db6ac11e00d9f36bfc86f6f04fd0dca2
font_01_sfnt_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 10668 bytes
SHA-256: 5089be2562234d418d5036bf5c0e30d8ba1f38e6e83cea921df4817da72d153e
font_02_sfnt_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 16300 bytes
SHA-256: 0403557a8e7afa4f9ebc5da5b7e4d103d41de9f34b136e2e758ee05b3fb2871f

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