Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f24b52660040652…

MALICIOUS

PDF

80.5 KB Created: 2021-04-01 10:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 46539678f36230547cb4ec7fff8c6f97 SHA-1: ce6e3d4fe6864086e066aa3144b70cfeedd7bb3e SHA-256: 5f24b5266004065240e85542c3e0ac4be4e065d7f7a073d5aae97887b8c1af96
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to iPad issues, likely a lure to encourage users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=stuck+in+guided+access+on+ipad In PDF document text
    • http://dasopupure.iblogger.org/meduwatoxodapelowifafefow.pdfIn PDF document text
    • http://mowefopovog.mywebcommunity.org/wesaroripaledudozof.pdfIn PDF document text
    • http://gasolotiravizid.sportsontheweb.net/rozunosixazekevupa.pdfIn PDF document text
    • http://nebatomefov.scienceontheweb.net/58261813701.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/3070582859.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/bisizaz-mufugotik-gegiwo-kupavapefikifoz.pdfIn PDF document text
    • https://sejexogubason.weebly.com/uploads/1/3/1/0/131070030/3602497.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/parishkar_ldc_answer_key.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/beralepemevusetok.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/xefutosof.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://sorisavitekinuj.onlinewebshop.net/vadilopupo.pdfIn PDF document text
    • http://riniwipum.rf.gd/44336563907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf139afb-d56d-4c9f-b9fe-d6299ef56a1f/lufimodoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1508fed5-4e7e-455e-83ea-108328c82fdb/42831767492.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/79423607338.pdfIn PDF document text
    • http://fosufozixa.rf.gd/77818369974.pdfIn PDF document text
    • http://pavafisufopu.myartsonline.com/27825822579.pdfIn PDF document text
    • http://doxokalisawe.myartsonline.com/37937496894.pdfIn PDF document text
    • http://duwemanuwixam.atwebpages.com/60315837296.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_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 5164 bytes
SHA-256: 96fbbd29bbdfe33db50875e6c49d884137751794cc9a6154495c98c9cbb23470
font_01_sfnt_off000100df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 11176 bytes
SHA-256: c2002731d9cc9b067bb5c002a0de7a8a9807bad6e9fe5ed153439dcf24c7c1e9
font_02_sfnt_off000126ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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