Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d65fa55bb708d4d…

MALICIOUS

PDF

81.9 KB Created: 2021-04-04 20:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 97e57027705499c73377cfb452a4892b SHA-1: 23409ed91a95b495d7750ac6e6f817dba4bfaa3d SHA-256: 8d65fa55bb708d4d2a487110c768739748111919edc2d28344bf4d189eab0a7a
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 phishing attempt. It contains an external URI pointing to a suspicious domain, likely intended to trick the user into downloading a payload or visiting a malicious site. The document body, though heavily obfuscated, appears to be related to the URL's purported content, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=ponto+de+encontro+portuguese+as+a+world+language+2nd+edition+download PDF link annotation
    • https://cdn.sqhk.co/latosagax/Ghdyphj/strong_project_management_skills_resume.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496824/normal_5ff51402a1ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454055/normal_600f5a099fae5.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/xidUVhh/86973230208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_603d65efae2cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_60257b69eb637.pdfIn PDF document text
    • http://eushopvmn.site/31416647886xa6j3.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/AgdjbpA/16532419590.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/dgSia3T/christmas_flannel_sheets_canada.pdfIn PDF document text
    • http://hotsales-com.xyz/tesibujubuxawepm7who.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_37e8d5e5f5314ba793312608ad7efafb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49b6350-0a57-4686-acff-30e7b5a1cfc2/how_best_to_describe_the_moon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59bd189-ab78-4806-890f-d96e3a58ef6c/mds_3.0_discharge_assessment.pdfIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_2853c986a7aa499992c038cc49fe5b81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ae055f-4273-4b46-be7c-51758f530fbb/r_programming_project_examples.pdfIn PDF document text
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_39c96e5fe3714372b9a87bd4272b221e.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_8442cdc66ceb4265a4d88d2f14085720.pdf?index=trueIn PDF document text
    • https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_e66fd07dc2224081865881c49b54403f.pdf?index=trueIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_7b1d7ddbb061496298b71ea0c5e1c8f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b00f14f-9427-43fb-8c25-e8368c1d9bb2/pazuforedugedo.pdfIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_307704f586fb46d189ac6c6e8c652b73.pdf?index=trueIn 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_off0000fe0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0C 5468 bytes
SHA-256: aed5661a7ef47ba90a81df9dc95805168e2fc9225fa6db6a6e1a9c64ce240910
font_01_sfnt_off000110c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C1 13040 bytes
SHA-256: 44726fd71fc885112c87c836b3b0e6d048738475c2b7ee6b5c5e2de8727f323e

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