Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e76792f6766749…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 21:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a252c6664121364ef0de4aa289d90d0a SHA-1: ccd51354c1df9b77628d31c5e3506e6ccf107402 SHA-256: 09e76792f676674971d24871ec7939f2a8cbb5c2ae0d96e6a8f38be0ed9ae1dc
142 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=racer+underground+mod+apk+download PDF link annotation
    • http://yieldpharm.com/upload/files/nosuxapedemavijexanip.pdfIn PDF document text
    • https://terracell.pt/images/file/93202228005.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/29859021227.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/ravukex.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/51546122977.pdfIn PDF document text
    • http://yuha.be/_files/file/zatosixemoparolukewef.pdfIn PDF document text
    • http://kondicionery-himki.ru/upload_picture/file/49150737401.pdfIn PDF document text
    • http://zjbfjt.com/upload/files/viwekor.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/73783681001.pdfIn PDF document text
    • http://gzcil.com/uploadfile/files/28335669389.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/21859432255.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/23663818537.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/21649359730.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614242da48c69---solegefev.pdfIn PDF document text
    • http://gartenmessebau.de/uploads/files/74277953673.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/manajexolojufijezide.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c934335dbbd0e816831401fd1dc860ca/19609014969.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/83402608095.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/30345415038.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/lagopovagelizez.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/76897589184.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/68276465223.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/69206666212.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_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 10820 bytes
SHA-256: 040d9f1cb2093e493d333d7550458ec0490be2b147331762909222eb4243ea94
font_01_sfnt_off0000edb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB8 17372 bytes
SHA-256: c15015550efd75586a68e2ae42d31adeee2082a78a1957645ad6b9f0c072ffeb
font_02_sfnt_off00011aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1