Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6e2344558a92dd…

MALICIOUS

PDF

90.8 KB Created: 2021-09-08 18:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0dbbdc53ad7fa86fb9d4c6c0e13adfbc SHA-1: c16ca4f1756d26b1a8c853f1c7d476d45610c27f SHA-256: bf6e2344558a92dd6a70e22f47d6b0249a918e3bb7433b32111f279a7ae4492d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous unknown domains, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://angkortaxiservice.com/userfiles/file/63017077481.pdf In PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/55286337779.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/fusajat.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/58237149589.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/luxosagufomotusuxijepogo.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210902_EE6A9FBED3AB59CB.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210902061026.pdfIn PDF document text
    • http://sung1.com/upload/files/wapozubikofulufologiwun.pdfIn PDF document text
    • http://4yoga.by/pics/files/16412281596.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/vifepajubelolobatawo.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/28797200711.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/mudusidigevaza.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/13689808850.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/68438269373.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/lovugevomajijiwuwusov.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-3/20210903055555721963.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/rusodumojaxule.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137597fbb204---12800505350.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/99547584088.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137df2a9b633---kipunamoteme.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/34395210778.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/50378710302.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/lulifijenorowifozefag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=acgih+book+pdfPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD16 19112 bytes
SHA-256: ae03260de49e547b36ca74674ba7e6cfa7c35813ef9936770083f4cd24cc2541
font_01_sfnt_off00012f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F77 10300 bytes
SHA-256: b3aabe28b788851b86642a4f45e58f33bc00be852a53f196a46055c871685345
font_02_sfnt_off00014653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14653 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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