Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e72b165c409d12…

MALICIOUS

PDF

103.5 KB Created: 2021-08-21 07:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bcd54ccc1b114daed6381345fc6a27b3 SHA-1: cd3e1bf5a3be9fb541f5fa2864dce9a982b84618 SHA-256: d7e72b165c409d125404aa062474b540951eee03c2904003da484483902af51f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and URLs, some pointing to compromised CMS uploads. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. While no scripts were explicitly extracted, the nature of PDF link farms often involves JavaScript to redirect users to malicious sites, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 https://huntic.ru/uplcv?utm_term=kuch+kuch+hota+hai+full+movie+arabic+translation PDF link annotation
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d9221c91b7---26687947420.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/31cd0cdbefcbe12140788596a9b8ab73/ranukizeveniwam.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/midarixusuraxopisinejo.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/dudimi.pdfIn PDF document text
    • http://1carl.com/userfiles/file/leluxuv.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/parj4rlou387omi7sb8e76llg5/luvogotosopidare.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/95950371307.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/86851669270.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/bubabakesif.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/97843d2cacf5ed9a9243e41807c73400/vinavomapar.pdfIn PDF document text
    • https://longhoang.vn/upload/files/nezojifigudises.pdfIn PDF document text
    • http://screen.by/images/file/55822293605.pdfIn PDF document text
    • http://idroter.org/userfiles/files/73778153968.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad73cdf25cd---pexewebab.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/d3df84737f4acf8c76d9eca63ef7d60b/liloju.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/66357542047.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/dmaued4m7f2f7mtrtun6lsljjj/xozatedatag.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/clr2ggul2chu8svs824lafup53/foxojezikuwutonida.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/ravijatuwogonelesetixofeb.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/72964512794.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/wabewimoso.pdfIn PDF document text
    • http://screen.by/images/file/bimupojite.pdfIn PDF document text
    • https://banghenails.com/upload/file/84670156179.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/13022779085.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001131e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1131E 27516 bytes
SHA-256: 3e1677171922b51b4c0a5f5ef0c1e8eb3c4624dc618dd382006da1a34397d2da
font_00_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_03_sfnt_off00014329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14329 19156 bytes
SHA-256: 7321844bcce1735b82fad12754e50038847a2ca83bf5f56e56280648204fb823
font_04_sfnt_off000174fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174FD 10992 bytes
SHA-256: e95d9e801943de53af0f7aa68668bb69c559cab09fe38222b9ba49c2e208bf87

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