Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fa95c98cc19d4a…

MALICIOUS

PDF

83.6 KB Created: 2021-09-16 02:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e1ce16bd57ca6bc2d1e38db7e30ed526 SHA-1: 081a8e2bce5c954420f52dd73c3785ff500a7e1e SHA-256: 09fa95c98cc19d4a13e86be86c0fde87d2375ad33a4bddd6f65ffd6ce5dff392
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://specializedfacilitymgt.com/public_html/userfiles/file/gejubev.pdf In PDF document text
    • http://sanzmendia.com/userfiles/files/50194521175.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613440ae82eef---49077693077.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/89335164921.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/11935103199.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/37101415462.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/bixisedesug.pdfIn PDF document text
    • http://poiskvod.ru/images/file/muxusutajugo.pdfIn PDF document text
    • https://ghnservizi.com/file/72363978038.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/883301541.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/popozebuketaporugef.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/96161776664.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/91520137696.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/jisubojig.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1b4930f22---92345672329.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/tonibovinupiwo.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d1fd4aaac---buvut.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/24128436048.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/93283110499.pdfIn PDF document text
    • http://kotrackusa.com/fckedit_file/file///20210916_6_27_22.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/najonoxigutoritedep.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/71830542469.pdfIn PDF document text
    • http://naso10.com/userData/board/file/xexowukiropugonuroza.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210910005759.pdfIn PDF document text
    • http://www.thaitofu.com/image/upload/File/marugofafotinolitoge.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/43059840831.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+check+wifi+signal+strength+in+androidPDF 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_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 17772 bytes
SHA-256: 1ed0a0c72509ad8ab901e276d2468fae21e09470ca988e7d813e3fbb8ca89f71
font_01_sfnt_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 10924 bytes
SHA-256: 62e182cf21b22656a95c11ba52a231d871299945d04a622a2282e5a858d032dd
font_02_sfnt_off000127dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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