Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c7901b8a856a65…

MALICIOUS

PDF

86.9 KB Created: 2021-03-20 19:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9694ca8b85d6aaa322d8caf02cb8ca7b SHA-1: 5acefbf344cb079d399cab6588de8523dfbfd504 SHA-256: b3c7901b8a856a65b914456f118717571a17e458743c8dc81452e2a6e122bb2b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to 'Halloween coloring sheets', indicating a phishing or malware delivery attempt. The presence of external URIs strongly suggests the document is designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://pelibifir.ru/123?utm_term=halloween+coloring+sheets+disney
    • https://cdn-cms.f-static.net/uploads/4453906/normal_603d545746234.pdf
    • http://pavareginuko.22web.org/mumivifolurosojok.pdf
    • https://cdn.sqhk.co/xafiguzi/ejEijm3/try_free_samples_and_write_reviews.pdf
    • http://sevibifodome.getenjoyment.net/how_to_do_a_hard_return_in_indesign.pdf
    • http://salufogi.iblogger.org/12370133147.pdf
    • http://rowowevu.mypressonline.com/tafanibezex.pdf
    • http://kuworekokinig.medianewsonline.com/99699586088.pdf
    • https://cdn-cms.f-static.net/uploads/4420018/normal_6047dd85ee589.pdf
    • https://cdn.sqhk.co/japokaxe/Uiipjgp/76503215382.pdf
    • https://cdn-cms.f-static.net/uploads/4369310/normal_600d62130cf9f.pdf
    • https://cdn.sqhk.co/dudosugebo/libighg/ripugolapawibojoxe.pdf
    • http://manekobe.22web.org/airship_guide_ffxiv.pdf
    • http://xeberul.mywebcommunity.org/kuzan.pdf
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fd7d28c0aea0.pdf
    • http://wumomotetidofe.getenjoyment.net/zoo_york_digital_watch_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4369640/normal_600e3b77761ee.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nebojemesiwi.atwebpages.com/47827473498.pdf
    • http://vofexepevoja.epizy.com/lopigovum.pdf
    • http://bopiguxa.atwebpages.com/20280084354.pdf
    • https://uploads.strikinglycdn.com/files/29a735dc-3364-4f78-a102-7c0a2dd2f8bc/play_blackjack_online_for_real_money_no_deposit.pdf
    • http://jomupaz.myartsonline.com/current_affairs_2020_in_english_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/a98e99c9-fe1c-4f9b-bafa-7cf59e543323/rebanakuxowazonilorozer.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32a.bin
629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 6440 bytes
font_01_sfnt_off0000f31e.bin
658ade5c20baedd93d01240b4f8a35c66e88b91f3da8fde927d2ebd28d533fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF31E 5356 bytes
font_02_sfnt_off00010554.bin
f8733cf274998d06e3f5923557b10e50631e663b2dfd4ed6a9cf87a2ad002034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 2540 bytes
font_03_sfnt_off00010fa3.bin
0784de2daffd992c635dead911cdfa328e232a8cc5ddd5fe6a01595114036682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA3 10924 bytes
font_04_sfnt_off0001350e.bin
4852d66229331d46b3879f4c6b974dbc7a00cbbe9b44d8334b0b14bf6e2d26e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1350E 16788 bytes

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