Malicious PDF — malware analysis report

Static analysis result for SHA-256 270b918ca095bd5c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-20 21:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3ab0e71270c68dd5cd54258fb80a2bfa SHA-1: d6509635636a582d7dc2065b045644210c5de0ea SHA-256: 270b918ca095bd5c8c81112d35b18f89a00217ae5f9f82ef9c52dd08854b9a97
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external URLs and is flagged by ML classifiers and ClamAV as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates a high-value business-email-compromise pattern, suggesting the document attempts to trick the user into believing there are new payment instructions. While no scripts were explicitly extracted, the presence of external URLs and the nature of the lure strongly suggest the PDF is designed to redirect users to malicious sites, likely to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://oniceh.ru/uplcv?utm_term=play+services+info+app PDF link annotation
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c924664f7---10095023053.pdfIn PDF document text
    • http://runo34.ru/attachments/file/29391321341.pdfIn PDF document text
    • http://vevo.keresztessyoptika.hu/elemek/file/wororiravuge.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/58400214800.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/nawesuxofogidaxuj.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/78773576514.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/799399302.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/kapabor.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/82201438249.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/15444758186.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/jumewerulitewuwu.pdfIn PDF document text
    • https://servicepapik.ro/files/pelasixijeresamipo.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/8420848927.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/detofujebijeluno.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/68354972314.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/12816093404.pdfIn PDF document text
    • http://msiutilities.biz/documents/nolazupebokirok.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/58772661719.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/48463949592.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/nizoxoneruxukujo.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/53491007846.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/vijexogufuwutorepelusale.pdfIn PDF document text
    • http://recuva.kr/upload/fck_img/1631188691/file/lotizeguxafibarakifu.pdfIn macro / runtime command snippet
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/rivapoxapefofetor.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421c4a1ad1a---fisivopowigek.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/roxewujewelumadugatemeju.pdfIn PDF document text
    • http://budaikepkeret.huIn macro / runtime command snippet
    • 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_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 10556 bytes
SHA-256: 8d188066e32daed674050a2af3d10b37e43c139c311a0bec1592ffc964e2e117
font_01_sfnt_off0000feab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BD 17636 bytes
SHA-256: 9cf91eb429b84d1c05b02270f623753c3d543d19bfde67f9714e6ffbfbf888dd

Open this report in the interactive analyzer, or submit your own file for analysis.