Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8eed4a7a3ae819c…

MALICIOUS

PDF

75.0 KB Created: 2021-09-10 16:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9f7b85ecc2c7f036be6ceaa69e67b588 SHA-1: 74ea128a3cee1024b04a866aec231578ccb9830b SHA-256: b8eed4a7a3ae819c2e11d2030832959a572f199fa8706d474b3d72015fe6b228
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://szerecsengyogyszertar.hu/editor_up/gutiziduxinuv.pdf In PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/79993561412.pdfIn PDF document text
    • http://xn--elementy-zczne-kwb98g.pl/media/file/9759975087.pdfIn PDF document text
    • http://porpora.eu/imagenes/imagenes_contenidos///11530676739.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/danume.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/fukus.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613034a40a7b1---gasuriwiwaridibovoz.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/vamipetafumivivili.pdfIn PDF document text
    • https://digicpictures.com/downloads/37688127092.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210903_92DCB6360F070F87.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/tadegukosarelevateva.pdfIn PDF document text
    • https://olterus.org/contents/files/jonaruparaxove.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/tokadopofotoni.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021090407155945.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c4506d226---feridoteradez.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/xavubegodolukozof.pdfIn PDF document text
    • http://biafrapol.pl/pliki/file/74026869633.pdfIn PDF document text
    • https://aneri12.eu/res/file/judugosokide.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/2734891167.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/46459522924.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/28960037591.pdfIn PDF document text
    • https://phuquiland.com/upload/files/tafenokoxegejavu.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210908_CD21D2F9C3DDC7E7.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+go+map+hack+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 18004 bytes
SHA-256: 02176b0296e36f46cd502da96306586ee6c5473868cbb43f9e99a3742fa4a835
font_01_sfnt_off0000ee3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 10744 bytes
SHA-256: 65982ce096083437272adec15e16704b1ed1ade6d40d3b4c4d0aef173a41ce90
font_02_sfnt_off00010685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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