Malicious PDF — malware analysis report

Static analysis result for SHA-256 f567d64775ef4faa…

MALICIOUS

PDF

69.9 KB Created: 2021-02-08 23:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4c6a4522a1025f50e33eef8f42bc532f SHA-1: d64ad965242e96c1082e14e815f62daffb49b63d SHA-256: f567d64775ef4faa9f04e80874f7546a14a5fc8a9132ae13a4bc5b36b745e85b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure align with techniques used to redirect users to malicious sites.

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 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://baarspo.ru/aws?utm_term=belajar+tenses+bahasa+inggris+pdf PDF link annotation
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/kozuvoxezelebol-mogalopiwiz-lizevixor-tuzefane.pdfIn PDF document text
    • http://chambrehub.xyz/706978956086je2c.pdfIn PDF document text
    • https://xoxopazivufa.weebly.com/uploads/1/3/5/3/135398299/vetiwojoxa.pdfIn PDF document text
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/57b458f.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/4016597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427514/normal_5ff9ed7c1c660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_60029b38bb084.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446027/normal_5ff2a3efbe2c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_6012978ac5d5c.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/69127a36b3f300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_601e89c71dd9f.pdfIn PDF document text
    • http://nickned.me/99305214838vb0se.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_5fdbc4e13f43a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473410/normal_5ff0281b631cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://falufobi.epizy.com/skype_for_business_application.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_off0000d3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A5 5568 bytes
SHA-256: 0604fddbdc166e5a46b28bd8ab4523d23c7a0ae2184454f02c8a94b64e2c38da
font_01_sfnt_off0000e68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68E 10556 bytes
SHA-256: 416443274aebaddae2a9799c753343ebe2401e1f9facc897615ca8e283489370

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