Malicious PDF — malware analysis report

Static analysis result for SHA-256 9325e74c594a122e…

MALICIOUS

PDF

101.8 KB Created: 2021-04-08 13:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 984db8f6aca95c8aedc280a8777d5088 SHA-1: 237a993cf6a4d44911417db8c107e96093d818bd SHA-256: 9325e74c594a122e1696b3e012c7e84927291595ccaf814c9f5f97d582f1e058
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a technique commonly used in phishing and malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware. The presence of a 'download button' heuristic further supports this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/strik?utm_term=maths+important+formulas+in+hindi PDF link annotation
    • http://xazivigufimu.22web.org/unexpected_eof_golang_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/FhcUini/58831329523.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/gdjjVhb/top_100_pop_hits_2017.pdfIn PDF document text
    • http://tapabafana.22web.org/watigujolofifubuluj.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/adobe_photoshop_online_editing.pdfIn PDF document text
    • http://vugewanir.22web.org/78716588567.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/d4jegdZ/sifalisixo.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/hjjcgf6/75399497564.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/wiretavutijunaxusodir.pdfIn PDF document text
    • http://jefuvumerusew.getenjoyment.net/aminofilina_farmacocinetica.pdfIn PDF document text
    • http://nosatines.mypressonline.com/attack_on_titan_season_1_episode_6_recap.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://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/02ef4a5f-f784-4625-a96f-590dd0f9c20f/86079153424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d3debe-b39c-4fd3-a3db-a4a0942f4227/nelorumozokatap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b4e566-57a2-4da0-aa78-57d355895a8d/37776080544.pdfIn PDF document text
    • http://positajugopisu.myartsonline.com/engineering_colleges_in_mumbai_university.pdfIn PDF document text
    • http://fazafowunop.epizy.com/92151407484.pdfIn PDF document text
    • http://kepelagivon.rf.gd/wepesebuvikuwefatujigivus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e91d867-0a3d-472f-b73d-04024211fa55/jukasizilevukitopojut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf380952-14c0-4a63-8949-9ce772b8e677/optimate_1_charger_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e714d4db-82a7-4684-8826-f6a249aab925/all_in_book_mark_batterson.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001180d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180D 5048 bytes
SHA-256: fef3e4bfcaa273a2b430da535795d2030cc234888c0ced49f2c0476a9da37574
font_01_sfnt_off000128fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FC 10844 bytes
SHA-256: f0a13e3d5d2cc0a233f5ded47244800ed3bec7440acc7d03da36aa32b8fca738
font_02_sfnt_off00014dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFC 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
font_03_sfnt_off00015bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BFD 15228 bytes
SHA-256: 60b5a288fc8be70b21e9dfe14102f61d3516e7f4eb03da268ef635576edbc1dd