Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba028678726d8ee…

MALICIOUS

PDF

76.1 KB Created: 2021-03-23 00:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 23b288552a5073e12ff8eb680bdd2259 SHA-1: 38e636adb0c13c97ab77bd5bfe27bfbb30a576f7 SHA-256: 9ba028678726d8eed27f4e014f6bb5233e78030d7408bd956d0cf0dd07250063
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, strongly indicating a phishing or malware distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially obfuscated, contains keywords like 'nurses progress notes pdf' to lure victims. While no scripts were explicitly extracted, the PDF structure and extensive URL usage are characteristic of techniques used to deliver second-stage payloads or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://kuzutuzo.ru/wix?keyword=nurses+progress+notes+pdf PDF link annotation
    • https://tewizoduwab.weebly.com/uploads/1/3/5/3/135341898/3506700.pdfIn PDF document text
    • https://jobuvurivoko.weebly.com/uploads/1/3/2/6/132681743/kixubikulanegapu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460466/normal_5fdd6fe4d4b16.pdfIn PDF document text
    • https://vonemiwez.weebly.com/uploads/1/3/0/7/130776812/1476405.pdfIn PDF document text
    • https://titugujogimob.weebly.com/uploads/1/3/4/0/134017720/3944771.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489977/normal_5ff55771e47cb.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/312365.pdfIn PDF document text
    • http://kevesojesofun.22web.org/arris_dcx3200_m.pdfIn PDF document text
    • http://xofazonir.iblogger.org/across_the_stars_violin_sheet_music.pdfIn PDF document text
    • https://luwupedo.weebly.com/uploads/1/3/1/3/131383743/4175c7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5feaf00963429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412588/normal_5fdd83fbe747f.pdfIn PDF document text
    • https://xogowabixebeva.weebly.com/uploads/1/3/4/6/134612916/fuvujisunogewaduliji.pdfIn PDF document text
    • https://fadatofi.weebly.com/uploads/1/3/1/3/131381363/570463.pdfIn PDF document text
    • http://fesimekipi.iblogger.org/45784061357.pdfIn PDF document text
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/levifijutilofob.pdfIn PDF document text
    • https://rupodekopo.weebly.com/uploads/1/3/4/6/134642208/puwamakokebozozi.pdfIn PDF document text
    • https://wisiwojapano.weebly.com/uploads/1/3/4/8/134896472/filigizejawob_basebevidujafe_pugonevene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufatiji.rf.gd/92085964427.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_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 4936 bytes
SHA-256: 3879838d6bf62cf03169460a1a43b56ba41ebb0bf92bdf7ee27ec1eed6d3b881
font_01_sfnt_off0000fb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 11324 bytes
SHA-256: c71308fa43a7a62d318842a6ae84a1786f86d66ce9fc9516b18d5050e4ba3dd4

Open this report in the interactive analyzer, or submit your own file for analysis.