Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e5d978a8f4d092…

MALICIOUS

PDF

90.1 KB Created: 2021-07-31 15:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0368b153ab95273de90a77c7483e7634 SHA-1: ddad6149bdbde00efe323ecf75df786969965e7f SHA-256: 48e5d978a8f4d092a28f9fee2ca214583d25d55e9a0e305726234e7df5467f7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, disguised as a search result for software keygens. This suggests a phishing or malware distribution attempt, likely using a spearphishing attachment vector. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=xforce+keygen+autocad+2014+mac+download+windows+8 PDF link annotation
    • http://krikrik.ru/uploads/ckfinder/files/rogeted.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/49e3545f6cb4821e29ebb3d9c05a4568/62634118335.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/96353638083.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/15100126418.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/penitenanixexogivaluma.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1d3540d1e---70757382932.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/31961537758.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/temoromaguwelijegagene.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/63161876051.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0df6ab4f---7162420900.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac1513147e---42517888668.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f3e2cb9ae31ece0ea00e2dcc56399f48/xirolo.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/57405591436.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082bd91326d0---29258082545.pdfIn PDF document text
    • https://ptogel2.com/contents//files/dipisovog.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f87165e796---96377305591.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/punuzotomanidefatanaju.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/50539799861.pdfIn PDF document text
    • http://licausi.it/userfiles/files/wufugejazenozo.pdfIn PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/97511097221.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa390391c7d---xedofakilexawuditexim.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/42633776788.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfbb2150df---zenetenedigozuzinoxifi.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c98be822d---mawosebowaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D4 29960 bytes
SHA-256: 0148f87c616c7f6ececa7f088ddabff98810c7b7c82492650c26e0bf5f7bb135
font_01_sfnt_off00012406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12406 11800 bytes
SHA-256: 190f4d43f18d6f04af0c248a26c3adfeac816d60635b2ab2a0f83b598aa4510c
font_02_sfnt_off00014045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14045 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1