Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbd50097b563905…

MALICIOUS

PDF

70.3 KB Created: 2020-12-14 00:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a0d09f5c81458ec79da7b3e82fb6c54d SHA-1: 195a6d8b3bf66024d6cb253b994946d131e076e6 SHA-256: 7bbd50097b5639058a93a18f8b1863093dd4f34dfb9fe683474bac249e0a5d6a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, https://traffnew.ru/strik?utm_term=delta+math+answers, was found embedded within the document, suggesting a phishing or redirection attempt. The document body appears to be malformed or obfuscated, but the presence of the malicious URL and the high-risk heuristics strongly indicate a phishing attack.

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://traffnew.ru/strik?utm_term=delta+math+answers PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf6c173299f0c54395dcb/1606219459603/taxpayer_relief_act_of_1997_crossword.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14640df132613bbc04837/t/5fce0fd08a55f2188b9e22df/1607339984769/24474540499.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ca9c17e7202640030589/t/5fc5540d3c02f22b9dbd4781/1606767633438/26095323991.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e657be9b693951246ba3/t/5fcbb2c764036b6143935eee/1607185095916/tiniw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d5d111f6a41984a77cd7/t/5fd688030f11661d4c31b3bc/1607895043898/hashimoto_thyroiditis_clinical_and_diagnostic_criteria.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/91271490453.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc531585bcb0228a29e8486/t/5fd606443ebe04163155c134/1607861829478/fixenererokojoxaresik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3c479842dc0d2fce7e22/1606237256406/47106331313.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6afc95e8e827d42b66858/t/5fc847876652ad59ec23549b/1606961031314/battleship_craft_money_glitch.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/tewowi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27d4ebd14ff0dd2a6b98d/t/5fc7c5ef71235964e0bf80d7/1606927855784/tetujixosuvavipinezolev.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/stranded_deep_custom_maps.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_off0000bc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8E 5016 bytes
SHA-256: 2f45018c89f6bc619e12eb1ac65f3fc898a33e170cb357d2565a24dc1a0e6639
font_01_sfnt_off0000cd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD81 12412 bytes
SHA-256: ec48c884089b4fe17a3038df73b60b2cf848ad9134ac59f2456934a9c5c7e126
font_02_sfnt_off0000f76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 16116 bytes
SHA-256: a429b15c16e0043c18eb939bf84ce6b150b6205f10ba04e45c60969e039bb0dc

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