Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b68491da7d126e8…

MALICIOUS

PDF

82.4 KB Created: 2021-04-13 18:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a9fd4ba457a46f112087d77f6e6368 SHA-1: b75338505bb2352ec00622f7fb24e4d2a6660eda SHA-256: 4b68491da7d126e801662e632c6e9449b1a7a592ce160d557a3ac3ccf0633f54
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=who+is+victor+in+miss+peregrine
    • http://sizuxofutitarax.mypressonline.com/60365566897.pdf
    • http://mokuduvejevuz.scienceontheweb.net/causes_of_the_american_revolution.pdf
    • http://arfeshome.com/charas_full_movie_hd3j2ao.pdf
    • https://cdn-cms.f-static.net/uploads/4383582/normal_606cad563a6e1.pdf
    • https://cdn-cms.f-static.net/uploads/4382948/normal_6027f42c44dcd.pdf
    • https://cdn-cms.f-static.net/uploads/4464739/normal_605449c64a33f.pdf
    • http://kurs1.xyz/what_are_6_weaknesses_of_the_articles_of_confederationhsrsk.pdf
    • http://lagejarejitog.mypressonline.com/architecture_of_data_mining.pdf
    • http://nulatapukedu.scienceontheweb.net/home_automation_system.pdf
    • http://zipubezexupoka.mywebcommunity.org/uso_de_antiacidos.pdf
    • http://dipazekonowa.mypressonline.com/army_pay_fixation_chart_2017.pdf
    • http://everydayy.fun/juderexeforunetojame0v86p.pdf
    • https://cdn-cms.f-static.net/uploads/4366381/normal_6032a0264ca65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/purawuma/pumazotenut.pdf
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_c7497341da5a44aab8852fe78d1c0b75.pdf?index=true
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_c92c5564163e421a98640b3493b9cc6a.pdf?index=true
    • https://s3.amazonaws.com/runuzitexokol/carnivores_dinosaur_hunter_hd_hacked_apk.pdf
    • https://2cc935b2-b854-4d3d-8499-e3bac5ec7384.filesusr.com/ugd/2e82fc_8bfe93e80a794284ac9fe3508415fe83.pdf?index=true
    • https://1e6856c5-1481-42a3-8d1a-2a2567f9fa5a.filesusr.com/ugd/a8b033_cf6b204003df494ca1f57fe3de940a42.pdf?index=true
    • http://dapizodipe.myartsonline.com/what_is_the_best_book_for_gre_prep.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_off000103be.bin
a021ad459bfbe1786b9cdc5c3bb52e7b730df323108cb026f057dcc754cd066a
pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 5180 bytes
font_01_sfnt_off0001154b.bin
9332e4acc529a21d43601c2ddce8bcf3baea8e06ebabfe9b8def86f331ebcf7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1154B 11280 bytes