Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9a6562de8c9af2…

MALICIOUS

PDF

73.6 KB Created: 2021-03-25 16:44:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13c76370a55d63168d8ca7ef3128c782 SHA-1: bc1472ebf590e029fa0d9535f4a16818a2a9bfef SHA-256: 6e9a6562de8c9af2baec887631aff11f1c483c9dd6283fd429970b78e23d0a22
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI in a malicious PDF suggests it's designed to lead the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/wix?keyword=pharmcas+early+decision+2020
    • https://cdn-cms.f-static.net/uploads/4427295/normal_601b3a7f13e41.pdf
    • https://cdn.sqhk.co/feduvefas/fhfggyc/53506096837.pdf
    • https://cdn-cms.f-static.net/uploads/4368219/normal_6022925016330.pdf
    • http://zonojebiridizo.mywebcommunity.org/virufu.pdf
    • http://suwefazimim.medianewsonline.com/basic_cytology_and_genetics.pdf
    • http://wejuveziwep.mypressonline.com/guia_de_medicina_ambulatorial_e_hospitalar_unifesp_hematologia.pdf
    • https://cdn.sqhk.co/liweruruzed/geghjje/spelling_bee_games_online_for_5th_graders.pdf
    • https://cdn.sqhk.co/letinumi/eHhf4hu/electric_guitar_lessons_for_beginners_near_me.pdf
    • https://cdn.sqhk.co/nowavutu/9yibxie/century_21_rego_park_closing.pdf
    • http://sajutasure.22web.org/xijerafutipezidomigipavot.pdf
    • https://cdn.sqhk.co/suwefememe/YjcshgY/vagewenitukujidatopeli.pdf
    • https://cdn.sqhk.co/vobipibomuk/hbXgdij/texiwevima.pdf
    • https://cdn.sqhk.co/vuwipabobatu/ojayigI/fun_facts_about_zodiac_sign_sagittarius.pdf
    • http://bikelumonekodex.mygamesonline.org/nufuja.pdf
    • http://wivevadevenumet.mywebcommunity.org/35094278781.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/benubapopikaj/60053571974.pdf
    • http://futoriw.epizy.com/20011263509.pdf
    • https://s3.amazonaws.com/toliwudalamem/calories_dunkin_donuts_plain_bagel.pdf
    • http://duvugagaxanawag.rf.gd/85854074565.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_off0000e157.bin
0ecb673a5b94ce9c597e9e1a077c4e4b7617064695ca43f2ee33ccdeff90d08a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5556 bytes
font_01_sfnt_off0000f413.bin
f98385b427725ad9ad99aaaebd0aadcc0ee8f81e4e6148a718c8a6ea0e72420e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 10736 bytes