Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea3d1dc31a67d58…

MALICIOUS

PDF

113.4 KB Created: 2021-04-22 23:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 128a4cd264b051fee3088a6b750de4b9 SHA-1: 28788e830ee10884c347b8949e255d7fd8aa669b SHA-256: 5ea3d1dc31a67d5837499f4c9de95dc67ed844b0fa026a9d39fbce0d9ceb0435
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one prominent URL appearing to be a lure related to a search query. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/strik?utm_term=what+is+oil+mixture+for+2+stroke+outboard PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425230/normal_6007eac90222c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479236/normal_6006631fd6917.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fee9d57dd9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_6039d77e7e757.pdfIn PDF document text
    • http://fejalakifuvotux.iblogger.org/jorozepagasevewod.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/systematic_review_guidelines_equator.pdfIn PDF document text
    • http://gotiwekiz.iblogger.org/jenojigidev.pdfIn PDF document text
    • http://fipodusot.iblogger.org/86267117346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462059/normal_5feb36d436bac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xuxixezatazifax.epizy.com/64944755271.pdfIn PDF document text
    • http://xekaboz.rf.gd/37753725781.pdfIn PDF document text
    • http://gobozukelawi.epizy.com/moxojekalika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e026110-90fb-47ba-930b-d7728c5b036d/51169903304.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/nowiditezunuzojaja.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/18531607776.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/46860521492.pdfIn PDF document text
    • http://dowovefedomo.epizy.com/coloring_the_periodic_table_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27c53f5-f196-4972-81c9-6d1418f7172b/bokegakilututopug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47f7579-3f6f-4d38-bd2f-8e1ec1a7f8e3/202417883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafd674d-788a-47c8-943b-acd06d8eba2b/39670235558.pdfIn PDF document text
    • http://jolavewavesuj.epizy.com/nofutadosurigemexofanige.pdfIn PDF document text
    • http://xugeseza.epizy.com/blocking_anticyclone_formation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ABB 5340 bytes
SHA-256: 0b16b06da22e835e50eb017138905d7d8f3fb19ebc0a34411592c2e897dd0ca9
font_01_sfnt_off00017cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CF2 13244 bytes
SHA-256: 667b2db083afb2b0d9ba3d938cd1c4472ff65b842a0f3c15ff09c5603f98e8ab
font_02_sfnt_off0001a96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A96C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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