Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e565243e80b2ac…

MALICIOUS

PDF

79.1 KB Created: 2021-04-30 13:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4cc5b3462d00e8d9293fb99ced8b49f4 SHA-1: 294b9889cb5febf4ab1ec6980726134a9eee475e SHA-256: d9e565243e80b2ac3d749947e77f8819c04ad397c3684747d84ede61bf4f0ed0
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a link farm or phishing lure, redirecting users to potentially harmful sites. The PDF structure and embedded URLs point towards a phishing attack vector, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://golowaki.ru/strik?utm_term=elton+john+last+song+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415936/normal_6002e7887bdd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5fe8a995e5212.pdfIn PDF document text
    • http://ing-cliente.com/583749396991z6ir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_6003e484ebd37.pdfIn PDF document text
    • http://daniele.store/apics_certificationweb5a.pdfIn PDF document text
    • http://everydayy.fun/photography_company_profile_sampleh7b80.pdfIn PDF document text
    • http://interbank.link/gezipabuxijopajaguvkyv24.pdfIn PDF document text
    • https://rodelifefi.weebly.com/uploads/1/3/0/7/130776661/lijovova.pdfIn PDF document text
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/2171044.pdfIn PDF document text
    • http://bilkan.fun/70193748900o5xk6.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/7b6d79.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/79909674616w6g3n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_602170b3a6a3a.pdfIn PDF document text
    • http://sehq.xyz/book_report_ideasakmxd.pdfIn PDF document text
    • https://vetedikagumon.weebly.com/uploads/1/3/1/4/131453784/7977626.pdfIn PDF document text
    • http://reduslimitalia-official.site/best_prepared_thanksgiving_meals_2020c32xm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467038/normal_60532ce660c2e.pdfIn PDF document text
    • https://jivimukik.weebly.com/uploads/1/3/0/7/130775904/wogumevurexe.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/8419154.pdfIn PDF document text
    • http://perfectiona.online/933789619140db6q.pdfIn PDF document text
    • https://mewerenazedesaf.weebly.com/uploads/1/3/4/8/134885553/filixisigo.pdfIn PDF document text
    • https://kupufulat.weebly.com/uploads/1/3/4/6/134643140/05f399ae6f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bojafazes/4744592037.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/adf._ly_link.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/why_is_my_remote_volume_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/world_map_with_oceans_and_continents_labeled.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_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 5196 bytes
SHA-256: 38f7653bcb1ebd7f6121aecd22db3f0d5108b00bd6ff44c5e9388f2ab2817183
font_01_sfnt_off00010720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10720 11264 bytes
SHA-256: f0ef7b1807ec9f8161419c53862daf5b2c8b340f01afb2dc97923cadc4d49d93

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