Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6a656b57bd4a88…

MALICIOUS

PDF

98.1 KB Created: 2021-09-20 15:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 117756fd0e09fefb0df05b3bcab39748 SHA-1: ecb79eb0b3f3969c62ba47eb7d480f5193434129 SHA-256: 9e6a656b57bd4a88ace2b238891d0905ea0b83c9aec1ee7e315ed7b4efb19edc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JS points to T1059.007, and the overall delivery mechanism is consistent with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://drafthe.ru/uplcv?utm_term=pokemon+black+2+nds PDF link annotation
    • https://vjlabor.pitscovn.com/uploads/Upload/files/filugaselazuve.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/roxadujenijuxonidujugej.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/709irkpv2qh9m0u64spfc0jpf6/ranelutuzag.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/jevuletekumutozopapuj.pdfIn PDF document text
    • https://quizai.com/uploads/files/wedewuru.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/marilemesanarizo.pdfIn PDF document text
    • http://www.somdattabasu.com/fckimages/file/bejubujavolu.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/67597751754.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109131407089743.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/96419278072.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/duwejilenolirekinadolosi.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/86880256704.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/kokexigevufuv.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/45199475095.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/kojofodud.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/87974154108.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/45280262445.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/30691808016.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/47210264602.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/loxivadofavubamapesusene.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/sexoverajizilupinaxerola.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/sotubotugegajoru.pdfIn PDF document text
    • https://inarsindbari.org/uploads/saxevopoda.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/pikefad.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/47120409798.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/36871404999.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/db9c4af60415c22a0d30f53dbfd62720/zojojenalifokogejewus.pdfIn PDF document text
    • http://bitree.net/ckfinder/userfiles/files/56663114682.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_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12880 10592 bytes
SHA-256: 82b9f60bcda831134533b3de63431e09c319a4cfebe69eba0abbfe16b344b23d
font_02_sfnt_off000140bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140BB 22504 bytes
SHA-256: a7fbca68f2e802108c519e275f6f7c042664c9ba2102a633abb0fa336eb8245a

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