Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b2f1dc33b8f28f…

MALICIOUS

PDF

85.0 KB Created: 2021-06-27 02:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62cc087c1dd86ae39958bda51147fff3 SHA-1: d59eb8296306364e9ba9fdd405f2dbbb894d3ccf SHA-256: 95b2f1dc33b8f28ff855f14c770974acb9950c1d5a8cb81e3c2b2b2461a74ff1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites or for SEO manipulation. The presence of external URIs and the overall structure suggest an attempt to lure users to external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5986b7d7a---weroso.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160704f294dfb4---somigezewaxiborewixa.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/fa7d11111d643bec98bb881a6717f393/wanavaxosi.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083f2cf6432f---31989119923.pdf
    • http://krzysztofmalec.pl/gfx/fck/file/32337832142.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609943978c2d5---28290036256.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b06be7c166d---rapasekopasige.pdf
    • http://acril.ru/ufiles/files/43421669882.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/08971f71185cd9f6305cbd13585c409b/37332977560.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa4e869175---mositugugasa.pdf
    • https://vandolderskb.com/images/usr/75442814809.pdf
    • http://phuocthuan.vn/images/pic/file/rosokajovad.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/7ov2lo73iushbuluu2femok9e5/vopinuf.pdf
    • https://sbufficio.it/file/93982259453.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e843b82e2---21183655435.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea67d2a481---69515911605.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f4097ab66---lozaxad.pdf
    • https://limsurdua.com/contents//files/zupesakaxusujajavizonugog.pdf
    • https://aspaeng.com/files/image/files/16153162723.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/00m3d6dd2o568iqge8puv4cel4/59006988375.pdf
    • http://blpest.com/UserFiles/file/75883732487.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc689bf804---42884156447.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2826b32980---22975957279.pdf
    • http://daydala.com/userfiles/file/jovixase.pdf
    • http://alimentosldm.com/userfiles/file/56818726157.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=football+prediction+sites+for+today+games
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75a.bin
5319b233cd6b86afdb31bc439ae630fa043d8601b72d25af7c80aa9f86a2ee23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 17216 bytes
font_01_sfnt_off000114a4.bin
1bb80bee6d1cae75c646d82211d9a03b926014d93fc9a0f69ec1f1b11ebef3b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114A4 11196 bytes
font_02_sfnt_off00012e6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6E 16792 bytes

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