Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf1fe137a5c5d0c…

MALICIOUS

PDF

85.5 KB Created: 2021-09-20 23:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0fa3d3f2e4ba709db07b081d76385fcf SHA-1: c51d3f6634d0cd1ad89266bf618125c18f8772a1 SHA-256: fcf1fe137a5c5d0c5051cd0df02ce4b5085691caa3be79a53d8540cfdffcb5f4
166 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. The presence of a 'Password-protected archive handoff' heuristic suggests the document's purpose is to trick the user into believing they need a password to access an archive, likely containing a malicious payload. The document also contains numerous disposable URLs, indicating a link farm designed to obscure the ultimate destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://mayjack.com/upload/files/80683749195.pdf In PDF document text
    • http://villapellegrino.it/userfiles/files/68335337994.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/82802987922.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/52962625162.pdfIn PDF document text
    • https://slide-bearing.com/d/files/10308814842.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/37535366691.pdfIn PDF document text
    • http://jianianhuayule.a9188.com/upload_files/art_files/files/20210903_053342.pdfIn PDF document text
    • http://weldingplaza.com/files/file/9621016288.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/verexosugonorub.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///tesovaguregigojadixof.pdfIn PDF document text
    • http://showdoimovel.com/files/files/69019578446.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/25169454867.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/27724647719.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/ruwejukemagame.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/12838018698.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/fexako.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/farudugimuwemono.pdfIn PDF document text
    • https://badeluxe.com/userfiles/files/56121834013.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/48103860952.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/18223199189.pdfIn PDF document text
    • http://ned.ru/uploads/files/zemiwipamofepuw.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-13/20210913031045209208.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/4612395196137ed582fc8f.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ultimate+epic+battle+simulator+download+androidPDF 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_off0000e722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE722 18344 bytes
SHA-256: 2cec4d875bbf6f3aa8402b2cf7279cf183b370b08dc26354359adc883c169527
font_01_sfnt_off00011684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9B 11008 bytes
SHA-256: 04706e4ffb45f66687e25154aedaec4bb9d84ad31ae4f4d7ee26670689e7bc9f

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