Malicious PDF — malware analysis report

Static analysis result for SHA-256 585d21f46d5b1513…

MALICIOUS

PDF

85.8 KB Created: 2021-07-05 12:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e0acf0798f60b21be052ffdece2d953a SHA-1: 32efc4bec872f78c227c4c1746bc51011cd8f918 SHA-256: 585d21f46d5b151310420d9864f8e9db7571e02e59c4315c4faa9060a26d86b2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress upload directories or disposable hosting. These links are likely intended to redirect users to phishing sites or download further malicious payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan distribution campaign.

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://philabc.ru/uplcv?utm_term=anaerobic+decomposition+of+organic+matter PDF link annotation
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/72306351484.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/fobonojibixojekujo.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/vagebob.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/618c589137f2e7aebf763486b6516800/81644049501.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3caf87ad9---rabilawikinasub.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/18227084218.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d60d1d0b846---naxunenutivipaguka.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3ge003cn2rbvvkvh68uqv41kdu/fixakopimopu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085e25c19b91---novutizubakulatovewus.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c438bcfdd---wukulutuwexerizakapisiw.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/pijen.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/n5vt7qg0agmhqur6jaah5devr3/52473008142.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/826889682ff6e20e91bddb5e6df57896/lemokopowemijepegi.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/d860e8a28636541c11cda0306fb34f5b/madodisanozowefesuzamab.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/4ef53d4211d3c4b4aae6e2c15a30e990/46534775131.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/19379821377.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/vukefebolukuna.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9622133d---57916432863.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4b155839b---66141071759.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a55a0596745---sofuvogavupimiwodusax.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bba887ae4e---60269446884.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/97344780342.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a839112668e---51361745771.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 11040 bytes
SHA-256: fb2664e16dc6255fc70868f233be4beebc21fcbc209e3e69e82b02f461a6bd08
font_01_sfnt_off00010778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10778 16312 bytes
SHA-256: 0fcb091fc604591dbed000a291a4d9e04e90bfa3dc005432226a68be0eb6cff1
font_02_sfnt_off000131c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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