Malicious PDF — malware analysis report

Static analysis result for SHA-256 414209655df9da39…

MALICIOUS

PDF

72.0 KB Created: 2021-09-16 08:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b7e9696390f34ab62f6bb6eca9eef0a0 SHA-1: a8ca4e3af70d3454c8523481736fa2ad90fd3c75 SHA-256: 414209655df9da39faf6eb20852535bbf62033b3f3f8f31486eae6115d5dbc36
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm, suggesting it redirects users to potentially malicious websites for phishing or credential harvesting. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://huntic.ru/uplcv?utm_term=login+form+android PDF link annotation
    • https://gad-elhak.com/userfiles/file/75371298120.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/pazix.pdfIn PDF document text
    • https://sim2007.com/files/18979896135.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/97432746197.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/nuzivigitefowa.pdfIn PDF document text
    • http://wimborst-ceramics.nl/ckeditor/ckfinder/userfiles/files/nipanoxifepexew.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/42976489670.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210906053452.pdfIn PDF document text
    • http://intertravel.hu/_user/file/72916770847.pdfIn PDF document text
    • http://blekinge.boj.se/uploads/userfiles/files/zitivelijin.pdfIn PDF document text
    • http://flightshop.jp/images/blog/file/lujorotugunaf.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/91913835691.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/98228717517.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/56553455986.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/43493890742.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-5/20210905230554911585.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/nixuzadiniteponofeku.pdfIn PDF document text
    • http://homeopathyhk.com/files/22817377642.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3vmelmrc4iho3v17burlnh2m5t/38651681963.pdfIn PDF document text
    • https://pnvvr.ro/userfiles/file/ruwepozuxebonino.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/31354513782.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613060cb4a6b2---kopojobomawev.pdfIn PDF document text
    • http://jin16888.com/userfiles/file/gixidubonose.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/bovenuvexim.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_off0000b763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB763 10212 bytes
SHA-256: 64daa03a6aeb2be334fafc8f71f83678838c835e43b5793c4a05b79995bd4842
font_01_sfnt_off0000cdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF0 17432 bytes
SHA-256: 161008abf32a57ed063b1b58ebbfd1c3a5dd4a92bde7887723eb096eeaa7f06c
font_02_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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