Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e019068aa56053…

MALICIOUS

PDF

80.6 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: 40034b84a8fec5119fff71535b29f4d6 SHA-1: 45d9b82bfed29a1e3390a00eec4dbcb8a1528a58 SHA-256: 55e019068aa560533bba6d3030e3444eee540c7ff6902e8cb24e2eb2a39505f5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a "Kahoot hack right answer" lure, directing users to a link farm hosted on disposable domains. Heuristics indicate a mass external PDF link farm, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • 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://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://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_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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