Malicious PDF — malware analysis report

Static analysis result for SHA-256 274cc899f9e1f331…

MALICIOUS

PDF

79.5 KB Created: 2021-01-04 09:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7e5b170e4c0aba9377859d4f15aff1a6 SHA-1: eac09b701ba2c96fdbe06df7eb7bc32baa011e88 SHA-256: 274cc899f9e1f331a5ca53497ba837f974c158624b2182c5ab433b2aa7e6d3c5
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is also present in the document's metadata. The document body, though heavily obfuscated, appears to contain references to the URL and potentially other obfuscated content, suggesting an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=the+pumpkin+eater+dvd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5fe7818b12a24.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/b772b2ee-b9d1-4329-9cd2-f6251dda29f0/dnd_deep_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd926e83-57ef-4f76-bb3d-dd9f8d312d19/451_forest_ave_church_hill_tn_37642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689da9be-c3ff-4f7b-96af-cc5cea7dc1ce/83631054516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc276ba5-916d-4367-ab90-591bbec58cbe/jomizeloxunodesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574427b4-a62a-4f91-9bfc-ba6ad479ab6d/pepanefezavirugazuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523d5ad1-0ba5-4906-99f9-19122dd3a4a9/2416680906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079725e7-fbd0-4c51-9765-0f2ea1d45a40/virus_shawl_pattern_bella_coco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d67e6d-eee6-454a-8b5f-15e521c3b58c/34714127359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75597b0-0511-440f-8e19-7789f75447e7/kakomifarofoseverupatugo.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/illinois_lottery_post_results_all_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e28225-422b-4b1c-8cc4-ba432ee129cf/thank_you_for_your_consideration_meaning_in_hindi.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_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 5064 bytes
SHA-256: 56970a5acdad12a7a16b3ca44277909939fa03a6e603e9e692d4a706346ffdb8
font_01_sfnt_off0000f119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 10528 bytes
SHA-256: 95d573a1267b01b8632a4722a0eac86e3a21d7f085267402b68d91ad454f6a43
font_02_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 17984 bytes
SHA-256: 39dc0320aa26cf7beac0e098c0cff28b068eb1480ec1c568c14720aef6368aa1

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