Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae83ffcf0187f944…

MALICIOUS

PDF

87.6 KB Created: 2021-04-19 00:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c70f1954064f77b318fc3acb16468a44 SHA-1: 7a8ff3e910d8f50ea087e947c962eda23e96074a SHA-256: ae83ffcf0187f9443355cee891759dd0f0bdaee3b2b70bd7137ffa55c9b47b55
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of an external URI and the document's nature suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=significado+modo+de+producci%25C3%25B3n+esclavista
    • http://majusenise.sportsontheweb.net/pipexulenuzuvatila.pdf
    • https://cdn-cms.f-static.net/uploads/4457572/normal_602ba02492d36.pdf
    • http://fisareboveda.getenjoyment.net/the_practical_kabbalah.pdf
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fcd5073cd93d.pdf
    • https://cdn-cms.f-static.net/uploads/4366359/normal_604d39d109f72.pdf
    • http://vukuradi.mygamesonline.org/reading_comprehension_3rd_grade_online_practice.pdf
    • https://cdn-cms.f-static.net/uploads/4465685/normal_604d08c929055.pdf
    • https://cdn-cms.f-static.net/uploads/4413363/normal_60656d0bbe7ba.pdf
    • https://cdn-cms.f-static.net/uploads/4426687/normal_603a0a63ef9b6.pdf
    • http://mokaxizekebade.scienceontheweb.net/pejamefegeju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/54720318-8284-4fca-9605-0540d32eaaac/gorik.pdf
    • https://s3.amazonaws.com/wozowuledij/sylvia_plath_bell_jar_fig_tree.pdf
    • https://s3.amazonaws.com/numunenoji/24832067541.pdf
    • https://s3.amazonaws.com/novipaliwid/69741780481.pdf
    • http://gijifosunusu.epizy.com/fire_emblem_revelations_recruitment_guide.pdf
    • https://uploads.strikinglycdn.com/files/a015900f-d6e5-40d1-9ba7-1dd46d70d60e/26126659437.pdf
    • https://uploads.strikinglycdn.com/files/b85cdc9f-027d-4d0c-a14d-a5cff7119897/craftsman_yt_3000_mower_manual.pdf
    • http://dupowoza.epizy.com/konot.pdf
    • http://zuriromaruwo.epizy.com/93171984113.pdf
    • https://s3.amazonaws.com/pusixa/lumexesemudotewagupar.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_off00011303.bin
d36f35c593a4155fa7c1322ab067c70f27617aef1fe4be4132653e12e07ff352
pdf-font-stream PDF embedded font (sfnt) at offset 0x11303 5776 bytes
font_01_sfnt_off00012669.bin
03551ed678579a8b4026e9575bab25c253b81cc6a1829422c0a2ac0759ae2264
pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 12404 bytes