Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48623fa2da8108d…

MALICIOUS

PDF

81.5 KB Created: 2021-03-30 20:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3b5d11971211fc8cdfc2ccf2baeb5a8c SHA-1: ed1f774e5914f585b32d28dbfa34cc94f3eb87d5 SHA-256: d48623fa2da8108d229a8df890aceae39b4acc3dc6006ac379ab910894648472
134 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs pointing to disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are consistent with a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=background+biru+untuk+pas+foto PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474752/normal_6056037be8827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368250/normal_5ffea4679c6b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496378/normal_604c96a1b3e27.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/80713051246.pdfIn PDF document text
    • http://dumazuzutone.22web.org/96856987990.pdfIn PDF document text
    • http://zigorukap.iblogger.org/vuzasizuxes.pdfIn PDF document text
    • http://kitixukizogutik.mygamesonline.org/muzujumojasomijeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_6042d73e219e5.pdfIn PDF document text
    • http://tadezutalowebe.22web.org/microsoft_access_crm_templates_freeware.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53159a07-b8fe-4117-b945-ea769d3e909a/32277797972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3785282-b85b-4f94-b419-9031a12236f4/41377263978.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/93313226594.pdfIn PDF document text
    • http://nevoludez.epizy.com/autacoides_farmacologia.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/63632573369.pdfIn PDF document text
    • http://kasilabupa.epizy.com/25632177459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246e99b2-b751-4673-97e4-404a2c837a33/gavikunufinujofoja.pdfIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_2c8ebbfdf3214d6299d61ddb6af3aa1b.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_fbd6fcab7e4b4586987b8dec8fa1e634.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_1a35a251fe8f46e8989a0dec7947c3d4.pdf?index=trueIn PDF document text
    • https://af8e4364-7f8a-45ec-af3e-d69da1c27fbb.filesusr.com/ugd/12c36c_30b7377584de4e4b8052bff159feee6c.pdf?index=trueIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_ab92509a74814599831d6231c8b84732.pdf?index=trueIn PDF document text
    • http://pigutun.myartsonline.com/lujupitilesajamitof.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_off0000fe85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE85 5544 bytes
SHA-256: 1d399227b5f6fb1f44d26c38f14af9080bd873e2bdb811ebd31340e72355ae9a
font_01_sfnt_off00011170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 11100 bytes
SHA-256: 0f4c8d5cb484fed9aa9c1f80085de9b507dd8668e61591d09ea052f8d5150c5c