Malicious PDF — malware analysis report

Static analysis result for SHA-256 30999fc6f9dbf588…

MALICIOUS

PDF

99.3 KB Created: 2021-06-29 21:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a995c23200abc3246283f1cafdf5df46 SHA-1: 029a36b7207b87c2372a759d3b4823b24989bccc SHA-256: 30999fc6f9dbf58870ec508cfd12e6b2982315d8f730679e45d84b72b77bfd90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or malware downloads. The PDF structure and embedded URIs suggest an attempt to disguise malicious links within seemingly legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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://allytemp.ru/uplcv?utm_term=effective+trading+in+financial+markets+using+technical+analysis+book+pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/2547a9f65bb21897673e9333f93dc1d5/vovazoverusugadelapivuwut.pdf
    • https://ukmalayalamnews.com/userfiles/file/5746343480.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607830f7de7d7---lirodenobukilume.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160917daf0e765---dadubigin.pdf
    • http://voxel-avocats.fr/uploads/file/74176021002.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c410054a9---29594379345.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/nojug.pdf
    • http://medica-brno.com/files/13078918953.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a44e4938d30---razawaxidonuraw.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f853daa5fa---87021694633.pdf
    • http://shophouse.info/images/files/59329290798.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b82d7e5627c---gusonexu.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/i4cq8i48vli18il18jd0ubl99v/98981930095.pdf
    • https://bywuf.org/upload/editor/files/32975262994.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/43475b32906e4292c455caa197754ee0/girojiretosutube.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b407eae93e7---98597680957.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738fc1d374b---lositinoxewosafiduviz.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/357aa4b41f8dbaac590f50aa48083cc3/wupawokitiwegote.pdf
    • https://securitydm.com/slicice/file/77584815817.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d73f3c4a9a1d79e1c6ac1340ff7aaefc/gusulafusipozeleva.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/n8mcrp6qetul3lsvr0gien3cp2/linumipusaborotuxe.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/ca0382293342e03afa7d8103d87c9179/pikamomurulilozubadenip.pdf
    • https://alate.org/admin/fckeditor/editorfile/tezuruwilexewowib.pdf
    • http://kiuanai.com/userfiles/file/vaxedotazavorarakewaje.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160791cbdbbbfb---26113581741.pdf
    • http://ajarnveerapong.com/UserFiles/file/41320543792.pdf
    • http://allycatering.com/userfiles/dopifomuge.pdf
    • 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_off00011dc5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC5 16792 bytes
font_01_sfnt_off000135dc.bin
9b4715e53c143e108b6dd052d1ace59b147fb1831ed6610b6eff9266a2e99966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135DC 11564 bytes
font_02_sfnt_off000150b0.bin
9b947808ed4c88235288b5fa762415dbb679976f5269346855d48e42c230ed8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150B0 17564 bytes

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