Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed8198cb356b8f6…

MALICIOUS

PDF

71.7 KB Created: 2021-01-31 18:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 240d450d501bb704bb82c9e3fb551c4d SHA-1: ca770a7524b9f23686be2811ad2a2515ce84d5ab SHA-256: 1ed8198cb356b8f609524e6941ea4470b45b4439ea9de4e757c7d9cc9b0f2e7a
126 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, with one specifically identified as an external URI. Heuristics indicate it's a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/123?utm_term=fire+breath+shout+sun+location PDF link annotation
    • https://pigikitukapu.weebly.com/uploads/1/3/4/6/134693564/mesuzogubuvixalelu.pdfIn PDF document text
    • http://jujiwaneko.iblogger.org/rigulujuxixadegefow.pdfIn PDF document text
    • http://trend-sales.fun/teoria_de_henri_wallon_psicomotricidaddc7s6.pdfIn PDF document text
    • http://milansit.space/ralaligolfzsop.pdfIn PDF document text
    • http://teren.fun/dumasemosald49wv.pdfIn PDF document text
    • http://regsen.website/pass_the_pigs_rulestihb8.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/15958704049om2mb.pdfIn PDF document text
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/6a76d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadexasumale.epizy.com/british_tv_channel_guide.pdfIn PDF document text
    • http://fuzadakeju.epizy.com/hallelujah_flute_duet_sheet_music.pdfIn PDF document text
    • http://fasilew.epizy.com/digital_platform_economy.pdfIn PDF document text
    • http://wumoxafu.epizy.com/winexugujin.pdfIn PDF document text
    • http://deroselewem.epizy.com/forgotten_password_on_excel_2010_protected_sheet.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_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 4980 bytes
SHA-256: 95ed1218c255f9b9488e1d1778a4610e49f8ccda2c2b55681e9b8534f5d1759a
font_01_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 10648 bytes
SHA-256: 7ef08df5ae8e5a9ff9a2f780dcc23312d3d8255725a57f4957f2c11ce5052292

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