Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9712a6fd771cd9…

MALICIOUS

PDF

64.1 KB Created: 2020-12-04 13:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1c9c58892d45265c6adc2ff8e73bb336 SHA-1: f7ad2cf17ffe5e403db868572eb52ca1737b93ff SHA-256: eb9712a6fd771cd9e13aaffb9c2c747ad6e7bcc9c20b57b0068c47c030823070
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to reference search terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/strik?utm_term=fresno+bee+obituary+notices 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/5fc36b8e2e537a05ef192680/t/5fc562323c02f22b9dc0f2a1/1606771250485/eighth_grade_spelling_bee_words.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc108971c8c7413143284ac/t/5fc5f34fe6d49a06bb604513/1606808401022/79562005868.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc594e3084698658e7e1dcb/t/5fc7b4d5a038a451bcf73c76/1606923480283/capital_one_top_up.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/gas_law_problems_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc392da27a199023ac63631/t/5fc86a597ff5a343ebf4e216/1606969946087/spelling_bee_crossword_puzzle_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fc185a2f8cdb769c61d3dc9/1606518179438/61809262154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec330573-9689-4b44-9080-f298d3a54bed/83337714113.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd1e0c89e1c4b8fb81223/t/5fc38c489ee0f32b87c12f4d/1606650959627/ucsd_econ_course_descriptions.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe40b9bc819f1cf4a4991b/1606303929818/rebujagaribum.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/nufugijula.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe17b2f81c9a2a0c6a76ca/1606293427153/kiwenelakujusujano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5094024b06a7eb31a0bf1/t/5fc7398993ad1a481217bcd0/1606891913724/wood_cutting_saw_machine_price_in_pakistan.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_off0000bddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDB 4960 bytes
SHA-256: d5e4c4f55231d767b4c6ec66b8b83693e88f9239881343c293db315b42f9dc90
font_01_sfnt_off0000ced4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED4 11336 bytes
SHA-256: 55c58ff9a99c8d52fe4f8dbe7ce88d6f85b6b6caf2448daac05bdda8afb867fe

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