Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5690039ee7e736…

MALICIOUS

PDF

84.3 KB Created: 2021-09-11 00:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e2a95d403f86338de2be02f7ea035142 SHA-1: f585ca2fcc87e87b5f8d0da9a1e8cf1ca9d27b9a SHA-256: be5690039ee7e7360d9e8abb428196c9d8f3553a2caba38797d48f3d23eb42b2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code. This script likely redirects the user to a malicious URL, as indicated by the presence of external URIs pointing to suspicious domains. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=gpemu+games+pokemon PDF link annotation
    • https://epgeptech.hu/ckfinder/userfiles/files/dizota.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/13310633672.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385e353bc41---7379204485.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/24211394691.pdfIn PDF document text
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/15242632373.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210903122230194.pdfIn PDF document text
    • http://newshop.jp/archive/file/70148621482.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/wawotulitawilezufij.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210904_FDF95E998A8F9781.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/48068399676.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/87412184309.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/nosixe.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/86517565681.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134d42607432---mezumatado.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/giripemi.pdfIn PDF document text
    • http://vhktn.at/images/content/files/guxuk.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/95085039776.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/63681885525.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210907_20CE84B12655E98D.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/84846847409.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/ratudimixuneletujiripaku.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/betumegifuwesir.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/sewewusiwakotodovikaboku.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_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 10488 bytes
SHA-256: 134589a9660dbfb5b5ce38a84e58f2628723eadd304a200e55ff98e34972ee89
font_01_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 18380 bytes
SHA-256: 1e12024665319da50102a6cf98a8793745f3ad465679294babdda9309406b30e
font_02_sfnt_off00012bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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