Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e175569783fe89a…

MALICIOUS

PDF

73.6 KB Created: 2021-02-13 11:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5c78f2e9fbfea67ff16f089e6aaea00d SHA-1: bed6eddfbdfba760d7746d5ea3e73b73a2092fd0 SHA-256: 4e175569783fe89ac5b819e4e0be9fa40cafaeb707a26b5fcc73defcece9a0bf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The embedded URL and the document body's mention of 'Cuisinart 360 griddle cooking center accessories' suggest a lure to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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=cuisinart+360%25C2%25B0+griddle+cooking+center+accessories PDF link annotation
    • https://cdn.sqhk.co/zenekukera/jfZhaif/daytona_international_speedway_ticket_exchange.pdfIn PDF document text
    • https://cdn.sqhk.co/xupebasolaw/gejfiqn/saforojif.pdfIn PDF document text
    • https://mewasopaligesar.weebly.com/uploads/1/3/1/4/131454012/3600707.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/ymfieif/vejomoz.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/cgjjzhx/fekufonapezubotuvosudera.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/nifovafapikalom-radugijujekolam-raxitu-tugovok.pdfIn PDF document text
    • https://borojixupoluba.weebly.com/uploads/1/3/5/3/135316148/fabemokupironoz-xutafesuwuto-gagevune.pdfIn PDF document text
    • http://opt05.ru/tineziranu8z8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dagubafevipiken.epizy.com/risk_dashboard_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/49758257081.pdfIn PDF document text
    • http://zuluvegutadetu.epizy.com/85035541011.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/62681578476.pdfIn PDF document text
    • http://pavasokunise.epizy.com/admission_form_aiou_continue_students.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/futedigoxumepeku.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/fegirasofum.pdfIn PDF document text
    • http://zanawolusebil.epizy.com/88063990720.pdfIn PDF document text
    • http://wuvuwipiwizovid.epizy.com/illumination_definition.pdfIn PDF document text
    • http://befadiw.rf.gd/exercises_simple_past_irregular_verbs_negative_form.pdfIn PDF document text
    • http://gewuruso.epizy.com/technical_analysis_charting_software_free.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_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 5656 bytes
SHA-256: 0512938ad9e0344ae62b133faeaebffd32cf701eb4b067a8257a94c9f1499691
font_01_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 10692 bytes
SHA-256: 1a00af3e30059165e5fb3dead5ab36bf0dee8175533b62daab26875e9444af48

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