Malicious PDF — malware analysis report

Static analysis result for SHA-256 1327bc07465377bb…

MALICIOUS

PDF

88.5 KB Created: 2021-03-24 05:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 768a1fbf0bed2a5c452f8a1d2febff83 SHA-1: d7b4ba0cd0dbdffb4766c609df6acabaca44aaef SHA-256: 1327bc07465377bbf92bd10b487e1bcd7d1d87895b4192ea980211ea94c8462e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://xezojetit.ru/award?keyword=logical+fallacies+handout+pdf PDF link annotation
    • http://dhl-order.info/quran_tafsir_ibn_kathir_english_arabic_html_free_downloadum0zo.pdfIn PDF document text
    • http://wafolepis.iblogger.org/kemiborabigitixilapo.pdfIn PDF document text
    • http://dreamingdeveloper.com/bannari_amman_hd_photoc2xt8.pdfIn PDF document text
    • http://lishop.site/moon_river_song_release_datevxpxj.pdfIn PDF document text
    • http://clyb-wylcan3.space/18072739973a4g8p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_090918b4eabe44c9b157e9d4de8a1493.pdf?index=trueIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_9cf15adb50054cb98970a50b39b85598.pdf?index=trueIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_0d594191af92496ca764470c4817a72b.pdf?index=trueIn PDF document text
    • http://biwipekimati.rf.gd/kudovuludisemodakovuwapi.pdfIn PDF document text
    • http://wofufudemito.epizy.com/home_loan_repayment_calculator_excel_spreadsheet.pdfIn PDF document text
    • http://sitesiku.rf.gd/35023091639.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/86908806860.pdfIn PDF document text
    • https://00eaa6b3-f026-4720-b00f-fafb40066352.filesusr.com/ugd/d498be_510304d01af54c2fbfcae8bbaba46dba.pdf?index=trueIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_48c4e58627594b85991fe5ff1e1b9c78.pdf?index=trueIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_24a6ff5bef604d518b77a988dfcf09f3.pdf?index=trueIn PDF document text
    • http://kibajopowal.epizy.com/bsc_nursing_syllabus.pdfIn PDF document text
    • https://add83a7c-0e31-48b3-928b-061d82ba9144.filesusr.com/ugd/205ae4_99155f086e07405d8afdcda41db0d2c8.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_3e65d600bd0f4ce191869b54fba45c6d.pdf?index=trueIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_ec1fe128951142b0a0ae68eae0ce0273.pdf?index=trueIn PDF document text
    • https://db22a0a0-c6c8-4eb9-9878-037c50d93224.filesusr.com/ugd/e2b5b3_be25b8174c3c4e0ea56d9b804a01c4c6.pdf?index=trueIn 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_off00011de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE2 5260 bytes
SHA-256: 37fa41f0715903a4a6a45c1d91ccd58a99c0ccdf97b92d53ad44bfba04fc5f09
font_01_sfnt_off00012fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDB 10812 bytes
SHA-256: 3427a66744ec5f701c536c40af9a307af423842f0ec4e2ea5471cb11e5cf2d25