Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ecde73c8b6f135…

MALICIOUS

PDF

75.5 KB Created: 2021-09-18 06:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a1e88866151d3afd710a6186392fa462 SHA-1: 8c807c4c55f805c15849b4f0a16034db16515a6f SHA-256: e8ecde73c8b6f13536b33eb9a64b713f205a94c9a4c2a33fba88c2c56f9effbd
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged as a link farm. The presence of external URIs and the overall structure suggest it's used to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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.
  • 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://gammatradings.com/userfiles/file/pirajetovininivip.pdf In PDF document text
    • http://yuc-fac.com/uploadfiles/20210909031015.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/85723857391.pdfIn PDF document text
    • http://pnalog.ru/images/file/892365001.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/44029940996.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/mesatet.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/popexul.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/53209147160.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/bpcq8qfo20k52l319b65imduvo/24173634365.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/fupedidoruse.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/xafowasujadivimurer.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/93427284395.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/80739158891.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/nudajokejaluwimosuk.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/kosejuzebiwepanom.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/buzinikunejelafutovisom.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210912042249134.pdfIn PDF document text
    • https://yifff.se/userfiles/file/galefukaxija.pdfIn PDF document text
    • https://sibconsulting.com/contents/files/kinotarigu.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/lekur.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/jijiv.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/zotakimewosesilalizi.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/nidawiguvazonaluxunami.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ipcc+songs+download+mp4PDF 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_off0000c35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB73 10548 bytes
SHA-256: d74685ca82766eff4d36a028e5c8e7502df6bf9664f9790d127bde314badf23a
font_02_sfnt_off0000f360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 17608 bytes
SHA-256: 0b98f2397c5779ebee03a24826afb3e7f65134f7fa730a3778f6851facca1101

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