Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e4bb3a10faccd4…

MALICIOUS

PDF

83.0 KB Created: 2021-04-05 20:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae89c5d72b2b37232ecb50ff4d057ce6 SHA-1: 7c228d69cbf74bd2ff9d2d81119e047435eca367 SHA-256: b8e4bb3a10faccd4bc116f0fb5331db5fb304532d7ccd8fb8f8aef244e9902ec
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary lure appears to be a fake driver download, indicated by the URL containing 'focusrite scarlett 2i2 1st gen driver windows 10'. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://lozipotod.ru/strik?utm_term=focusrite+scarlett+2i2+1st+gen+driver+windows+10 PDF link annotation
    • https://cdn.sqhk.co/wobuwozavenu/jigfsAa/wutaderavutawegimevesetu.pdfIn PDF document text
    • http://beautytopshop.site/the_linux_programming_interface_bookqh1eo.pdfIn PDF document text
    • https://cdn.sqhk.co/fowoleleda/gtGhgjb/bapexojev.pdfIn PDF document text
    • http://wobirarebi.22web.org/calculus_maths_book.pdfIn PDF document text
    • https://nenomoxemobare.weebly.com/uploads/1/3/6/0/136010140/faporetaxodir_pezajil_vewovu_tivuduwopowa.pdfIn PDF document text
    • http://goduvide.22web.org/76872040787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_605356178d218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482207/normal_5fd052e38f3dd.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/lVhiHhh/zoxiruvojokumawejovaz.pdfIn PDF document text
    • http://rasprodavaika.ru/mowinolo46wo4.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/acWFZsW/48597099068.pdfIn PDF document text
    • http://ontrade.top/vulematx82a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466413/normal_6011eeb2adbca.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/6852571.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/62d55667-a10b-465c-98f1-30e0d01e26de/99672005860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88f6c96-29cf-4df1-866d-f0709869aae3/60989468213.pdfIn PDF document text
    • http://jelovinusasanop.epizy.com/livros_em_sobre_meio_ambiente_e_sustentabilidade.pdfIn PDF document text
    • http://rotalewisiv.epizy.com/nogixiveg.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 5420 bytes
SHA-256: b533db402337d9b8b97aa542bcfb94517593f35f839d7c318fed9bc4f14fedc8
font_01_sfnt_off0000f5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B9 10768 bytes
SHA-256: 08be75fc8e2cd89e1ae705b435b5845b9003ac200f6d903e7b21465339a14a62
font_02_sfnt_off00011ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD8 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00013006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13006 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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