Malicious PDF — malware analysis report

Static analysis result for SHA-256 843800c1947fe025…

MALICIOUS

PDF

76.2 KB Created: 2021-06-08 17:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d1b18cbd217bdd16464ae355bfd998dd SHA-1: c8fd0a2c5ac7409b71d18770067548d414b79663 SHA-256: 843800c1947fe025d28387091a868e078b2a6c4753dae86fde3c6c238560f2b2
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites under the guise of providing a 'Kahoot hack'. The presence of multiple external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent, likely for phishing or distributing further malware. The document's structure and content suggest it's part of a campaign to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6796

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://garglob.ru/pbw?utm_term=kahoot+hack+right+answer PDF link annotation
    • https://jifejajazarig.weebly.com/uploads/1/3/4/3/134307839/duvarosojewenu.pdfIn PDF document text
    • https://tugupititu.weebly.com/uploads/1/3/4/8/134887320/da3ddfb8b1f.pdfIn PDF document text
    • https://sugogovofel.weebly.com/uploads/1/3/1/0/131069978/mediwu.pdfIn PDF document text
    • https://domuvajedoxu.weebly.com/uploads/1/3/4/8/134847007/4005941.pdfIn PDF document text
    • https://surarapumo.weebly.com/uploads/1/3/4/3/134305151/6dc4b576.pdfIn PDF document text
    • https://mikotefi.weebly.com/uploads/1/3/2/6/132695671/3a9a35faa136036.pdfIn PDF document text
    • https://fizozedodid.weebly.com/uploads/1/3/4/4/134484686/5895860.pdfIn PDF document text
    • https://balesiloruj.weebly.com/uploads/1/3/4/6/134671801/jefemi-jusavabake.pdfIn PDF document text
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/2755648.pdfIn PDF document text
    • https://mopabofigovusig.weebly.com/uploads/1/3/5/3/135319119/bf31d1fed.pdfIn PDF document text
    • https://jazejuvo.weebly.com/uploads/1/3/4/4/134439384/metabobedapuro-povetenalibug-kelatenifij.pdfIn PDF document text
    • https://mivuwapirodi.weebly.com/uploads/1/3/2/6/132681474/2761907.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/e72efc.pdfIn PDF document text
    • https://solazipakiku.weebly.com/uploads/1/3/4/5/134509697/jarofomowisen-gosuv-vilogadelurega-nesatekep.pdfIn PDF document text
    • https://bazusatibewin.weebly.com/uploads/1/3/4/3/134374280/4824367.pdfIn PDF document text
    • https://fopilifufisi.weebly.com/uploads/1/3/6/0/136055159/fesebakifugu_dobotepafoxegu_dopilewenukif_liwutumowemi.pdfIn PDF document text
    • https://vudeberas.weebly.com/uploads/1/3/3/9/133997553/safividovewulu_tasonalunuliriz_ranida.pdfIn PDF document text
    • https://jeporifitev.weebly.com/uploads/1/3/4/2/134265357/1109316.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
    • https://uploads.strikinglycdn.com/files/85fa56f2-515f-426c-af5f-151f2e3a8057/36827177655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a0f83c-843c-46d0-bc85-85b7faedc21d/4_w_on_transcript_look_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c637a3f3-61d1-4a9d-a9e6-7290fd0e6afa/what_religion_believes_in_the_spaghetti_monster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2988e6bf-ae20-49f9-8a6a-f164054a1d42/netgear_n150_wireless_modem_router_dgn1000_firmware_update.pdfIn 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_off0000f23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23F 4944 bytes
SHA-256: bb06dcdf40f9e0d79635b3678e78527600310e1cfc59e3f51b9684999f8b2a2b
font_01_sfnt_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 10528 bytes
SHA-256: cd816293a9a654d8d94776c4ffe4b650360dda656fbf7f72a5e42aecaa07a989
font_02_sfnt_off000126ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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