Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d2d82122a88e3e…

MALICIOUS

PDF

80.8 KB Created: 2021-10-07 00:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2231b8ad9ce94293b3430ef5831d61e7 SHA-1: 7b16edb4418cd54cc8a6446b9d7c9aa66a6fb7b0 SHA-256: 08d2d82122a88e3e5b80feeacbf01aa5ece91bb0405647760e1a2ccc9b541b62
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. It includes numerous external URIs, with one pointing to a URL that appears to be a redirector for a phishing or malware distribution campaign. The PDF structure and embedded content suggest it's designed to trick users into visiting a malicious site, likely as part of a phishing or downloader scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=horse+grazing+agreement+template+free PDF link annotation
    • http://c-amc.com/upload/files/manunuwikugepetuvabi.pdfIn PDF document text
    • https://simorgh.it/uploads/file/41887593877.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/wikevijebunagazaxeturafig.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/58597338457.pdfIn PDF document text
    • http://supportsite.myersi.com/images/e/file/20829243550.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/54477550390.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/71695040352.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/towevedej.pdfIn PDF document text
    • https://amoslodge10-org.alljobsinliberia.com/ckfinder/userfiles/files/pomurakoneluvas.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/ravulanagaf.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/38825721227.pdfIn PDF document text
    • http://hcwan.com/userfiles/file/72756322248.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/vufiteraxatuwevibolif.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/xozevogexesozalo.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/vesoram.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/mikozeviwufukewizunet.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/71575736031.pdfIn PDF document text
    • http://charivne.info/images/file/18781131331.pdfIn PDF document text
    • http://ocloud.millionserenity.com/images/upload/files/71017478104.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16156741e98126---gavafezopolewipexenovo.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/17613634601.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/zofidej.pdfIn PDF document text
    • http://royalgroup.at/tmp/11428732455.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/puxetudinugaxupelejibasi.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/lekuzusimutojekefewejij.pdfIn PDF document text
    • 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_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 10752 bytes
SHA-256: 8ec89e091664e3209f2a70691d3b8769ddf5df1917bc009c3b763dca102679cd
font_01_sfnt_off0000ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED21 18872 bytes
SHA-256: 10f3a2ebcc8e2f97bd79d942c52e5a8d6dc6447dcae9e967f9def031852d376c
font_02_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1