Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce69e01daf46bd96…

MALICIOUS

PDF

82.8 KB Created: 2021-09-22 11:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d606062e91cf532a5296f72168a8464 SHA-1: aabad117795b9f8c461785093315a4620aa51554 SHA-256: ce69e01daf46bd96ee99ab17b7d67dbb93a862d3ceabdfe5bbf442e6762b4027
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS upload storage or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://rivebistro.net/ckfinder/userfiles/files/dukaxevotaxezuxesurus.pdf In PDF document text
    • http://alfavs.eu/userfiles/file/76538472981.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/nunelofubupogudavem.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vjefjbf0porlisnm79fc2j85k7/4486570032.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/908e0d1d9e4851f95ec75bd103036e58/42421303773.pdfIn PDF document text
    • http://beiks.info/public/file/19829717565.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/29652523035.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/99541812011.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/89668496975.pdfIn PDF document text
    • http://caycanh.vn/images/fck/file/81507357210.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/jivirapanikelukix.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/94985247060.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/58161932339.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fc7d25faa---93299887492.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/bazasumel.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/rugotuzefisoxepe.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/wezidirojokanumupodujor.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/86975570689.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1631232769.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/15965917186.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/tetok.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/0ba0d2d2a8738d8d95dde5cded9fb4a9/dowamuxuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=friends+english+subtitles+season+2PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 17500 bytes
SHA-256: e860060b0283d41b7c4f54462e76ca24ce30c0b9c57785d0d2b98718fea5b126
font_01_sfnt_off00010ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA8 10864 bytes
SHA-256: 9f4066c53fea482e010303bfdda82beee36f294b6938a612bd102bfc033ab9d5
font_02_sfnt_off00012577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1