Malicious PDF — malware analysis report

Static analysis result for SHA-256 48477783b4f7c856…

MALICIOUS

PDF

76.2 KB Created: 2021-06-06 02:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b48f7e922caa4011518252ee6843d57f SHA-1: 1a645f56f96e95d9afaa0ab061b4c31879310397 SHA-256: 48477783b4f7c856fa8630aacd59bc62fab4f70adb988c2010699ba77645b1a8
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, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a safety data sheet.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://baarspo.ru/123?utm_term=citanest+3+with+octapressin+safety+data+sheet
    • https://cdn-cms.f-static.net/uploads/4388422/normal_602c1276b38a8.pdf
    • https://cdn-cms.f-static.net/uploads/4485718/normal_603029ae8dd99.pdf
    • https://cdn-cms.f-static.net/uploads/4368245/normal_604ee73963407.pdf
    • https://cdn-cms.f-static.net/uploads/4409623/normal_6017db7e6429c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pimepovume.pbworks.com/f/morepakeg.pdf
    • https://uploads.strikinglycdn.com/files/a263337f-d8b6-4798-8d43-b82c01a04bc3/foneridam.pdf
    • https://uploads.strikinglycdn.com/files/1e5a38ab-9f00-447d-acf4-186c16ed31ea/36424320962.pdf
    • https://uploads.strikinglycdn.com/files/5d1b726b-a712-45b4-b6dc-0dcecf5ce7ae/nomuwa.pdf
    • http://kigemulu.pbworks.com/f/bike_race_game_free_download_for_android_apk.pdf
    • https://uploads.strikinglycdn.com/files/4ce26a1d-c610-4ded-94ca-a274542bddc2/20770462165.pdf
    • https://uploads.strikinglycdn.com/files/a2ef1359-2bb4-4554-bc81-262c568c74c4/trigonometric_ratios_problems_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/2cba002d-2875-4c81-9562-18b090b8ba6a/craftsman_6.0_gold_lawn_mower_spark_plug.pdf
    • https://uploads.strikinglycdn.com/files/5bd4362d-6623-47ad-8261-f95940a3b1a5/pelumubalufegewabonomav.pdf
    • https://uploads.strikinglycdn.com/files/3f928700-edfa-46a7-84ff-d22992385ce9/what_is_the_tree_of_life_genesis.pdf
    • https://uploads.strikinglycdn.com/files/5c095800-4d43-4333-99cb-d726d2daacad/21178393654.pdf
    • http://furalagaposu.pbworks.com/f/zebco_202_slingshot_manual.pdf
    • http://togusan.pbworks.com/w/file/fetch/144686109/javutoninixularegesamij.pdf
    • https://uploads.strikinglycdn.com/files/643a9d27-4850-4dae-ac29-75b570f7a71d/research_project_proposal_format.pdf
    • https://uploads.strikinglycdn.com/files/be2d6c02-a4b0-4e2b-a00a-7b75a1b1881c/setineruz.pdf
    • http://damopijos.pbworks.com/w/file/fetch/144595065/vampire_diaries_books_full_set.pdf
    • http://xafusigivu.pbworks.com/w/file/fetch/144663411/transcription_and_translation_practice_worksheet_quizlet.pdf
    • https://uploads.strikinglycdn.com/files/cada9951-01d8-43ed-a455-37bd5f7aaea9/ginolub.pdf
    • http://vawaguzidatu.pbworks.com/f/gilasofa.pdf
    • https://uploads.strikinglycdn.com/files/42bcefe5-1fc0-409b-8b23-944201a55693/20417310174.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_off0000ea91.bin
09841659662968e18902ebe8d09fa1508777e6f5efd78999a78be4d526e70788
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 5476 bytes
font_01_sfnt_off0000fd3e.bin
fba432cd766abacc7a035c25203142a3417eb082ba13f3f75d0a3468ea35751b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 10716 bytes