Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdacd76e80b054b…

MALICIOUS

PDF

91.6 KB Created: 2021-08-09 17:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cda1fb760e4288795895abdeb97665bc SHA-1: 330e84ac0fc09f04bdad982f7edad891b7ba17b2 SHA-256: 5fdacd76e80b054b2ccfa71ff0d8e29ec217a5a6f847e14a7809d637a08cfb26
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CLICKFIX' heuristic indicates a social engineering attack that prompts the user to execute a command. The document also contains numerous links to potentially compromised or disposable hosting sites, suggesting it is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 http://wagnerpc.com/userfiles/files/27320378363.pdf
    • http://artospace.com/pics/file/zabagoralagidutovuvonis.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/92208079681.pdf
    • http://nadiadsa.org/userfiles/file/8625153262.pdf
    • http://conblocmanado.com/pics/file/bufodapufoposinosagokogo.pdf
    • https://wcfkenzi.com/ckfinder/userfiles/files/fipeviriz.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8b5e7de52---30931037685.pdf
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/71052736796.pdf
    • http://www.pzkexie.com/up_files/file/92523292687.pdf
    • http://ottuk-e.org/userData/board/file/kavesaxiwale.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/1nokng6237kv2saugo94gdv01g/fidelogufufa.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f83f55aafb7---sakemaxukefaluse.pdf
    • http://uhy-th.com/image/upload/files/gawufejepilob.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/susaniwiwutamimu.pdf
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/28138937442.pdf
    • https://basundharamart.com/userfiles/file/magebaroxasuxa.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/1nq38r0fb2lc364d921i6crq74/32670864856.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ae55cb12189e41b6165351200f0ee2ef/vamul.pdf
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70639483144.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976f2c11251---17353268804.pdf
    • http://faxik.ru/ckfinder/userfiles/files/luwofajiti.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2fc98460---38734517492.pdf
    • https://ka-base.no/images_content/file/gorutizixufivekuze.pdf
    • https://chmelo.hu/sites/default/files/file/netutaxumejajozunab.pdf
    • http://zzweien.com/d/files/4720401212.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+get+minecraft+java+edition+for+free+full+version
    • 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_off0000fed8.bin
55d12fdeb4d8d29d73bbe14d746cc04e8ed30cebb0354b1de6d685e091007e1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED8 11192 bytes
font_01_sfnt_off000118d2.bin
0dfae33041a476273f3296d974e42514968784d7114389cb0bd5549d56773bc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x118D2 16936 bytes
font_02_sfnt_off000144e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x144E3 16792 bytes