Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad7c74004e5a000…

MALICIOUS

PDF

80.3 KB Created: 2021-03-17 11:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d70f6d93f3382208feef59806345e93 SHA-1: c142fc3d9c8bfaf4d195d3abbeaca3f51559bbbd SHA-256: 1ad7c74004e5a0007fac02c46da67ac5940aad5a30135566c72174c6d7df90f2
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that points to a URL related to a 'Stafford loan master promissory note'. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to trick the user into navigating to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jacksth.ru/award?keyword=stafford+loan+master+promissory+note+pdf
    • https://cdn.sqhk.co/nexetifosam/htOPmBR/silver_dollar_city_branson_missouri_schedule.pdf
    • http://rent-nout.site/bugotadekabadowolaluzajqqtc.pdf
    • http://naturalm.space/11955191957k08al.pdf
    • http://tiktokhd.design/hoja_de_balance_de_comprobacionpb742.pdf
    • https://cdn-cms.f-static.net/uploads/4370768/normal_601f41f5d93fd.pdf
    • https://cdn.sqhk.co/vufebevefo/jjBjcqi/nigulatojuduvemuzotadogup.pdf
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff6d31f6b6f2.pdf
    • http://tevuvisena.iblogger.org/how_does_print_head_alignment_work.pdf
    • https://static.s123-cdn-static.com/uploads/4415524/normal_60052a032db0f.pdf
    • http://madewithsunshine.com/vugijewukemotavogojfln7.pdf
    • https://cdn.sqhk.co/jevipugirofi/gdzT5jf/sulaxiladisidakadilosibe.pdf
    • http://mxbur.fun/e_district_odisha_caste_certificateetboz.pdf
    • https://static.s123-cdn-static.com/uploads/4369189/normal_5fcd3238d5dba.pdf
    • http://rabota-plus.club/how_many_carbs_are_in_wendys_caesar_dressing0zmr5.pdf
    • http://boludibaderujir.22web.org/fios_remote_codes_sound_bar.pdf
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5ff7c5e0b5ec4.pdf
    • http://yourcy.com/kodugenj1dj.pdf
    • http://agent-ritual495.online/bajonegdtssi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fasikisiteji.epizy.com/lafuvofamufivasor.pdf
    • http://jadupapobixe.epizy.com/ridekotufupiziwofiwex.pdf
    • http://wexipara.rf.gd/etea_test_date_sheet_2019.pdf
    • http://mapiwenasadig.rf.gd/periodic_table_coloring_worksheets.pdf
    • http://vaforapibasaw.epizy.com/python_tutorial_for_beginners_full_course_2019_free.pdf
    • http://fupaxanido.rf.gd/motorola_apx_6000_belt_clip_removal.pdf
    • http://tiwawaja.epizy.com/5163040728.pdf
    • http://mukazofe.rf.gd/chromium_os_iso_file.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_off0000fd7a.bin
87e43010ab48adb7dbd3b30cb75ac11f012a64414e36aa82698c4381ed9651ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 5392 bytes
font_01_sfnt_off00010fc6.bin
8427dce7fd600986e1b32c66cec58040c603fd618c9a3dae040d2310af45b221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC6 10484 bytes

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