Malicious PDF — malware analysis report

Static analysis result for SHA-256 493535ece2f2a84e…

MALICIOUS

PDF

94.1 KB Created: 2020-12-28 18:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c549f79971165c5c2101620e09e5e100 SHA-1: 70da93525c7995172ec879c936ca758fc6ac7f52 SHA-256: 493535ece2f2a84e55371188df3208042a098630085da634d94f072ac69f6c7f
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that leads to a suspicious domain, likely serving as a lure for the user to download further malicious content. The document body, though truncated and partially obfuscated, suggests a pretext of providing a 'free monthly activity schedule' to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/aws?utm_term=formato+cronograma+de+actividades+mensual+gratis
    • https://cdn.sqhk.co/xuvomuvugu/a5HUgjj/margherita_chicken_sandwich.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0e7f0dd8-587c-4c59-857d-a9e33f906d04/super_teacher_worksheets_long_division_answers.pdf
    • https://uploads.strikinglycdn.com/files/d412e3b2-e52e-4c33-ab65-89f652b86cf8/rodatitisinisomajawofado.pdf
    • https://uploads.strikinglycdn.com/files/86ecbcb4-fc02-4734-997d-26d4c0773edd/new_york_times_crime_articles.pdf
    • https://s3.amazonaws.com/jusagi/weather_report_golden_bay_nz.pdf
    • https://s3.amazonaws.com/rutufokedizon/anaconda_3_telugu_movie_free.pdf
    • https://uploads.strikinglycdn.com/files/537109c7-da3f-445b-bc61-17e6de6af86e/resojuwitalo.pdf
    • https://uploads.strikinglycdn.com/files/f8eb4fca-0fce-4f49-b5ed-452b46f72bf5/total_gym_1700_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/66574e91-0b02-4922-b107-ffb6c588aeab/82614275190.pdf
    • https://uploads.strikinglycdn.com/files/6f35da8f-4b4b-4499-8a7d-36f25c9ee187/jisatubepozodadabijuped.pdf
    • https://uploads.strikinglycdn.com/files/63ab8210-0034-4f97-868b-190680279175/98011012926.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011514.bin
36a53b3ff9c8c07440ff8ce1e1da3cb698ed8e4ffb410b07f342c197cba38e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11514 1724 bytes
font_01_sfnt_off00011d6e.bin
b95bd996c3fddd20d4f54f11d226100993dd41779d7c71ca8a0f98d373246a55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6E 5272 bytes
font_02_sfnt_off00012f48.bin
ec5d40fa1000930173f7af4510ebcda605a81285296da50b396e13af61040009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F48 11784 bytes
font_03_sfnt_off000155c8.bin
df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155C8 16060 bytes

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