Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee0f85c1bf2f16b…

MALICIOUS

PDF

108.8 KB Created: 2021-03-30 00:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 450e05de42875d82656d38d761793b81 SHA-1: cc31af0ba2895d5b290a7eacbd4f8ee9bd30bf08 SHA-256: eee0f85c1bf2f16bce13d065856cbe3e0a74fb9ea91b84d84442dede4b967528
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 pointing to disposable hosting services, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://seumenha.ru/strik?utm_term=metro+2035+pubg+mobile PDF link annotation
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/4692772.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/zewawuxexujeg_jumexezo_xovuzuzok_lafuripesovize.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/mozovonajuw.pdfIn PDF document text
    • https://jedifugidu.weebly.com/uploads/1/3/1/3/131382595/jekosevozeben_tabofedepesibi_xagokega.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/votofulofuwigesekibab.pdfIn PDF document text
    • http://dedukali.22web.org/koxop.pdfIn PDF document text
    • https://riledamulobav.weebly.com/uploads/1/3/0/9/130969772/zorajumiw.pdfIn PDF document text
    • https://kosonijuzar.weebly.com/uploads/1/3/5/9/135974682/digenonoterut-rikuraxinobiv-banon.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/vajunexepupivikober.pdfIn PDF document text
    • http://dabedera.mygamesonline.org/accomplishing_the_impossible.pdfIn PDF document text
    • https://wemizufatevovig.weebly.com/uploads/1/3/4/8/134896488/kapasixokadib_kipena_faxifuw_mawajaroze.pdfIn PDF document text
    • https://mopuvavipobum.weebly.com/uploads/1/3/1/0/131070525/tisokemog.pdfIn PDF document text
    • http://romikemixukoj.iblogger.org/teoria_del_enlace_covalente.pdfIn PDF document text
    • https://tisudarolajese.weebly.com/uploads/1/3/0/8/130813738/tamogoniputu.pdfIn PDF document text
    • https://wajadotufa.weebly.com/uploads/1/3/1/8/131857144/3557541.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/bevemuxemarixoxemuzubiga.pdfIn PDF document text
    • https://worikasef.weebly.com/uploads/1/3/5/9/135966717/1763922.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/gujovekaturi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/921fdbfc-8e19-437c-b460-abb2150be350/45294940393.pdfIn PDF document text
    • http://voxinuxo.epizy.com/ap_enadu_news_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2adc6756-2777-46b8-84f7-e6df9cff3f06/allen_bradley_plc_programming_training.pdfIn PDF document text
    • http://rimuwogiwofu.rf.gd/insurance_risk_inspection_report_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c311474-1ce7-445f-8012-f868b83d9384/how_to_use_turbo_extreme_steam_conair.pdfIn PDF document text
    • http://kizuwopo.epizy.com/ruvuzotigavasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6df89ac-4561-4edb-8f22-e26c56e8a155/harry_potter_trivia_questions_difficult.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b225c544-5c7d-4a58-b774-3e77556f69a3/72655613129.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 6424 bytes
SHA-256: 91838cdcd5e0aafc5bf0af0349e66d06387e1551d24a013491c16510681f740e
font_01_sfnt_off000135de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DE 5460 bytes
SHA-256: 5d831eb2ec035d73bfd6cc9951a2038344f9d16f37cab20a71e915f794e08a0f
font_02_sfnt_off0001485c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485C 5324 bytes
SHA-256: 1237adb3b718d480be79be6dab679d574d1d4947350fda261f83280be9226c1f
font_03_sfnt_off00015bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC0 21356 bytes
SHA-256: e85a406ccc76ef938a22053a88d7e380d4f69c0f1b30221ae470ac584f1b4afb
font_04_sfnt_off00018dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DEC 16524 bytes
SHA-256: 31175612c4225278c0cd897cb05e7413f6629432b0bf5f653e9b456035a6220d