Malicious PDF — malware analysis report

Static analysis result for SHA-256 9705b559f77eb6d1…

MALICIOUS

PDF

73.7 KB Created: 2021-06-14 02:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c9f6bc0dfa3dd22bc5fdd01170c9cc0 SHA-1: 7c01a2636af41dfff88f39d8c4b668283b7531bf SHA-256: 9705b559f77eb6d1a1a2b889eb5a6f08c913c470ccb5df96786a422c21a8829a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, suggests a lure related to 'test listening answers'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://garglob.ru/pbw?utm_term=plus+2+test+5+listening+answers
    • https://cdn-cms.f-static.net/uploads/4369928/normal_6059ebf51fdff.pdf
    • https://static.s123-cdn-static-d.com/uploads/4473642/normal_60afec8fc9059.pdf
    • https://cdn-cms.f-static.net/uploads/4449984/normal_60c4e9a95a7ef.pdf
    • https://cdn-cms.f-static.net/uploads/4384644/normal_604815b733b77.pdf
    • https://cdn-cms.f-static.net/uploads/4378381/normal_605d9baa977f9.pdf
    • https://cdn-cms.f-static.net/uploads/4457573/normal_60607c08ce60c.pdf
    • https://cdn-cms.f-static.net/uploads/4475196/normal_60bd9c200f0c9.pdf
    • https://cdn-cms.f-static.net/uploads/4444874/normal_60211689c8036.pdf
    • https://static.s123-cdn-static-d.com/uploads/4447465/normal_60b18db942179.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/66d6764c-2540-4f96-b825-9cc46de2eea4/what_is_darwinian_theory_of_evolution.pdf
    • https://uploads.strikinglycdn.com/files/8353a965-5ced-429d-afe9-08c7dc060abd/physical_education_class_12_chapter_1_notes.pdf
    • http://vazufatar.pbworks.com/w/file/fetch/144675699/2d_logo_animation_after_effects_template_free_download.pdf
    • http://nerobedevu.pbworks.com/w/file/fetch/144458310/comprehension_passages_with_questions_and_answers_for_grade_7.pdf
    • https://uploads.strikinglycdn.com/files/0ff0457f-bcf4-463a-a0ba-6b16c99b8bdc/milagavenajit.pdf
    • https://uploads.strikinglycdn.com/files/caf87cb3-7068-4adf-a77a-541b36f8df7f/how_to_watch_fifty_shades_of_grey_on_roku.pdf
    • http://wiliser.pbworks.com/w/file/fetch/144475245/88839854642.pdf
    • https://uploads.strikinglycdn.com/files/a218f464-9733-4c59-a2d1-ef0e7efd25c0/typography_design_definition.pdf
    • https://uploads.strikinglycdn.com/files/deee6625-4c5b-425e-acf8-7b6fa6c28945/how_much_is_worth_mark_cuban.pdf
    • https://uploads.strikinglycdn.com/files/c0097896-ef75-4365-a80c-75ee01e7fabf/is_the_15_day_challenge_worth_it.pdf
    • https://uploads.strikinglycdn.com/files/0d324022-e58d-49ca-b77d-be56bc406899/59671365409.pdf
    • http://fubajulak.pbworks.com/f/gabep.pdf
    • https://uploads.strikinglycdn.com/files/3e61497c-ecc1-4016-a9fb-952510650d8d/63306195624.pdf
    • https://uploads.strikinglycdn.com/files/f5eb5a9b-1b5a-4a5d-a948-5e92df2cafb8/how_to_draw_a_realistic_dog_step_by_step_for_beginners.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4fd.bin
2cb73cda4909648b19ac03e560caf460795f2c7f61e8c62b6fa84ffaa5618f95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FD 5204 bytes
font_01_sfnt_off0000f6d5.bin
276fb21618969f02c9a87d497f5c9a601df23a8dafde9e80e22721c0e0f0df71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 10100 bytes

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