Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd184be1d9009bcd…

MALICIOUS

PDF

78.1 KB Created: 2021-08-06 18:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c8ac3c4c13f2a472471c91611af72988 SHA-1: cd45cd936d76ac0799d8f6ada97b9123b5349bcc SHA-256: cd184be1d9009bcdef54b9b69ebbe80f002a87b4753c95ac8b58419f7e323e14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised or disposable hosting sites, suggesting an attempt to distribute malicious content or phish for information. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a network of links for SEO manipulation or to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://aravlicraft.com/cmsCart//upload/file/fetaxesejoferonoliraluf.pdf In PDF document text
    • https://mycocoa.org/images/upload/files/25461771128.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/699419c0f1805e3e824f9723615d036a/44200937924.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/63505913463.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210619_8328c.pdfIn PDF document text
    • http://askort.pl/Upload/file/rolir.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/43801944809.pdfIn PDF document text
    • https://davaocarrental.com/images/file/jipiveb.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b4d1c36ed---moxidegor.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810111cb74b---felosezufegari.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cc78d737784e6dbad6154704417991b0/84175531203.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/xinekabijawi.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210703135437_9pa7dj.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/fukisi.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095da4fe7bf2---dadavidinewaneper.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607570ac1082f---51540708636.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/89887015818.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/84732330226.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/56a7009a3840f15cd2fa9fb821be520e/41726589020.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/fosikavubave.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bda3cf04816---lofuk.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/31063754171.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ejercicios+de+cuartiles+deciles+y+percentiles+para+datos+no+agrupadosPDF 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_off0000c8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BE 11016 bytes
SHA-256: 9109b57ffccf6056dab0877d37c82bac79061f7b10db0c8a20fd7e42f99703f9
font_01_sfnt_off0000e23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 17936 bytes
SHA-256: 1ac90b3042841d38d0c783282090b9e72d06ab626024cab87c6f281f4e781f5f
font_02_sfnt_off00010f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1