Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6ccd3145d9fa14…

MALICIOUS

PDF

88.4 KB Created: 2021-07-06 12:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2f059fa9822f379bbdc88d050cfc3da4 SHA-1: d4a8bbb4ae51d45d84c7a8da7b62110dc60d758c SHA-256: 8a6ccd3145d9fa14160d24bd8e9d09e5ff215d298eda82a4dbeea3080a696730
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It functions as a link farm, with numerous embedded URLs pointing to files hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. The presence of multiple distinct hosts and the use of UTM parameters in some URLs indicate a coordinated effort to distribute potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609618ce56069---89741838133.pdf In PDF document text
    • https://fedico.ca/upload/editor/file/72971011221.pdfIn PDF document text
    • http://deauville.ru/files/file/71029969013.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/18051771109.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608629b506e50---raxavuxopexil.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/657867cb7c1a69d3af6078de3275d6b1/24829479656.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7b2b2118e---66647704847.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9227fc50---14016551408.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608223b744798---zilasefuxijobefupopujoto.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/67777801ab630ef7ff651827f39a4600/pisuvowokojisana.pdfIn PDF document text
    • http://ruihuitax.com/files/file/27813944419.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/latigojunogifalupixor.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/50682085919.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/finifogi.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcda64c0ba8---18995526952.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/falexaxitabokikosufebafin.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f20b031c06.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/89ba9fb5c0cf4e100387b395182d4529/tujamugo.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/munowuwizejumugowerep.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c90aa981cbe---71247435187.pdfIn PDF document text
    • https://btegypt.comfile/69095298473.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/69592584474.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/a04c2e2c7b680a2992fd2d543446aa5f/kilabinu.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/0fc646593a3530339c12484fbea83536/62884655722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=due+time+meaningPDF link annotation
    • 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_off0000f636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF636 10116 bytes
SHA-256: 698c4599e25d48da349050fb2cd9405d0a2c88aa3349242501470b51892bb6c0
font_01_sfnt_off00010cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 18088 bytes
SHA-256: 708b1e4179db83c8ad6100e22c711aa3d707555ee96bcf7beaa8414f1b5e69d2

Open this report in the interactive analyzer, or submit your own file for analysis.