Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8adc52f0dca818…

MALICIOUS

PDF

69.8 KB Created: 2021-03-12 09:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e9602cd972377ea70c7782580ca6d0fa SHA-1: 0bb4100bd705459dbe2960a1834509b97ba12bfe SHA-256: 1b8adc52f0dca81842f38e86fe8df710b9f9577da9ad7e4f3f47263b2686f8be
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=aulani+resort+map+pdf In PDF document text
    • https://fomujozi.weebly.com/uploads/1/3/4/0/134016754/modezubu.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/duxudovitide.pdfIn PDF document text
    • https://mejoraxu.weebly.com/uploads/1/3/1/3/131380998/29c1cf78a59d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fe599afc188a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_6039e948b44a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459319/normal_5feaef9b7b5bd.pdfIn PDF document text
    • https://pipepixowufoxo.weebly.com/uploads/1/3/1/4/131452867/latutojudafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_601231cb6d2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_6016c981bceb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413968/normal_5ffa77081f69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_6018eecaed17d.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/UidZpGq/79736468925.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/haYg07G/dujudaxufotadezofa.pdfIn PDF document text
    • https://fijuvosezo.weebly.com/uploads/1/3/4/0/134096395/mifebuseduvozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_6035963a9a381.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5ffac212337db.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/haxijge/mafisosit.pdfIn PDF document text
    • https://bikinolij.weebly.com/uploads/1/3/4/5/134514604/667939.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/bojanuginobokovuralo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5fdc5a33d0250.pdfIn PDF document text
    • https://cdn.sqhk.co/digijodaga/XC0wiJM/labyrinth_definition_thesaurus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofifozanexez.epizy.com/angry_birds_go_telepods_app.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/heavyweight_bhangra_remix_song.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD503 5176 bytes
SHA-256: 11af29332366da53f3da3633e9a80c7b65333a37f577957f30e70b43050adbe3
font_01_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 10204 bytes
SHA-256: 9500515c532fd2773017278885ac26e709a037c810003336581857da825c62ed