Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ee0d219e033222…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 17:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 959a6ddb13806b6b5a0fec56e539c74e SHA-1: de4842b92802fbabfa90d8a2bb7007a28b61ed36 SHA-256: 76ee0d219e03322263190d491159239cad9a2b19b01fa6027656204778fa938b
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload storage and disposable hosting. These characteristics suggest the PDF is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=what+is+manual+excavation PDF link annotation
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/b8879d03505c5ebb715c673c4b2579cf/6995380091.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210628_A4A7E949B896E83F.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607d47d4bfafc---55911969025.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/60271324983.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/f6c9027cf30445e499295f6d5277ee93/rumesokezurepik.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f9294725---zasana.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/70532105382.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/97902112900.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d54ea2c8---55917082230.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ed2e4c961e30b2ab997a786867cbb5ed/diwoxabadipe.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a711c947c---80296453462.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/961stmu9iabonneoph603cs7ug/lobowesejeg.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160842749e1aef---bujazizejuxixekit.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160824e4730982---59711829200.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/512dee064466c77f1dda9b771112687b/nuledaxawumilamujuso.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072667d97cfd---xitowalekibonukarasij.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/xotedopabomojufopu.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/30589641399.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/98686103261.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfef3ca00---95702903632.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/misuk.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/34d9usdu1d6qj7h4g319cmf1l6/wonuzawarobopujobupevav.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbb2774f55---tinadefokaturiju.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/31867832747.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/f1810f0a6a36c15cc7b0beeeec3e2d63/kebeloziku.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/reram.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/fta45117bv0i08de3ljkeidcdu/zezimebonexomivijeviris.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 16104 bytes
SHA-256: b72367248a3fce15872a872444f9525e892c1bf325f07f6e656e60d05da2bcdf
font_01_sfnt_off000114ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 10656 bytes
SHA-256: 6dee219e50c61dfbbe9b12dc7ebca74136d5bffae911b125f5e0bf5b92d5cb14
font_02_sfnt_off00012d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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