Malicious PDF — malware analysis report

Static analysis result for SHA-256 02dfe28b66a18c47…

MALICIOUS

PDF

82.3 KB Created: 2021-09-13 11:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 86b4d46b19738a13ce21722aaea3511f SHA-1: 2e65f61ffdf8b9ec1d5754ff7097fe5129b58f69 SHA-256: 02dfe28b66a18c476005c586402663ec009310f4c6c93232e0ae0057653db02f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm designed to host malicious content, likely for distributing malware disguised as game cheats or cracked software. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mp2020.csysadmin.com/ckfinder/userfiles/files/92936601896.pdf In PDF document text
    • http://kencert.vn/uploads/image/files/17166290117.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/daxujavag.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210910_041849_133.pdfIn PDF document text
    • https://kebecelectrique.com/upload/editor/file/35372971646.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/38099887993.pdfIn PDF document text
    • https://shevian.com/images/file/palovemupizol.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16134f70a5b678---butedewa.pdfIn PDF document text
    • https://senfina.top/uploads/files/rosewadeko.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/vobatomulux.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/zotasijosafugagotimewonu.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/94120781087.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/kumijubeda.pdfIn PDF document text
    • https://xn--psg-9lac.hu/files/files/nipujokumebovoxas.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/11615849175.pdfIn PDF document text
    • http://abwva.com/uploads/files/dakatuwume.pdfIn PDF document text
    • http://timebymtm.com/upload/files/56487528181.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/40638420800.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/2322076113.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/51371136185.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/10/vadux.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5457c826152267d1237400a95a58cfcf/61347480173.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/42934916939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=clash+of+heroes+android+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA18 10620 bytes
SHA-256: 34b7cc4e5d69d630d09cbc9a0bc8671e7f2ecdd22f304f3af44059e49f327f89
font_01_sfnt_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A59 18436 bytes
SHA-256: d0e7bf73a46d0454c1a1cd6f5c424f6608e7ffc07d47e1ff1046012b0f3a4d9f

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