Malicious PDF — malware analysis report

Static analysis result for SHA-256 e295811a97013f58…

MALICIOUS

PDF

87.1 KB Created: 2021-06-29 02:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 639e47c27ada7a56351d6e920eb3ada0 SHA-1: 1ee2bdb6e6f109964eeaa6e6737e263d3fd7cc09 SHA-256: e295811a97013f58fe0f60b6f70f800bc77f74ddd627d5c6c68721cb24ff91ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://smidgel.ru/uplcv?utm_term=architectural+character+and+the+history+of+architecture+pdf
    • http://energy-labels.com/userfiles/file/lasemababatanesepoxoj.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/3df64e8a1bfe10e741d8e4cfd6460c85/gikenizorupidewamezosorub.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/04eb85bc3375ad87b03de89b8b5aac7a/13058468693.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/du9bt2nunos7t3mqkbkh7016od/38112745045.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/muc27obu6tcjasmres2ql68fj6/ramivulelulukizufijibeni.pdf
    • http://artgraf24.pl/userfiles/file/55846164732.pdf
    • http://envisystem.com/upload/userfile/files/98921228896.pdf
    • http://yonseri.org/userfiles/files/penigen.pdf
    • http://alituncer.com/userfiles/file/pixax.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160adcbc06082e---23708739421.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986ed750527---52057623846.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7952b1ea02---60707352856.pdf
    • http://kimandyoo.com/userfiles/file/vulesa.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084137c52779---jirok.pdf
    • http://parfumerieindex.nl/images/uploads/nilizogaxorabisagove.pdf
    • http://burfel.ru/upfiles/files/470649686.pdf
    • https://telewebmarketing.com/FCKeditor/file/73669108425.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0eac9a55bcb6bafb1e5a60d372a83847/jomawewora.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25db80e19e---kuxadajepi.pdf
    • http://nail-free.com/ckfinder/userfiles/files/60165929180.pdf
    • http://zahradysnapady.cz/soubory/files/jazetusuvapozapukubarexe.pdf
    • http://www.lugashotel.com/data/editorfile/bowab.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d86ae23d0---69539872110.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_off0000efbd.bin
ba9fff1bb04f490d69208f358d8041f7da39f67eb9f2df73540f21a656358639
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 17568 bytes
font_01_sfnt_off00011d88.bin
69a7bd18a5111bfc98986c0942265111588c292a57ec4d88ba637063f3aba926
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D88 10912 bytes
font_02_sfnt_off000136cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136CC 16792 bytes