Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d8e6e7ebe92267…

MALICIOUS

PDF

100.6 KB Created: 2021-07-21 15:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b04e60c2a61737b7e5e2a797395432e5 SHA-1: e71332e499fd0308330b016a5c100ad49f2ac760 SHA-256: f5d8e6e7ebe92267ed30948a6b56b8ee7da272106daf1e73cb726c22317937d6
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The primary attack pattern involves directing users to potentially malicious or phishing content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/173741eb25d50524fed5814bb86c2619/54970829829.pdf In PDF document text
    • http://huiking.cn/uploads/file/140308574677.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf69d093f---vorapizowegijibasakafo.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/4356287adc10f001cfeab741340ced9e/rusuwafowo.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/dojer.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/5d8bf245f1913780660b4db06377dcc9/52034400306.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/3f482ce1cd67fb45440b668775f5aaae/sobigawujarowuto.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/e10c4bf9682ea61c0be61315d03fb8c6/78623306405.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ede0cbe29ae---lolexuzasiruge.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160ee705642800---juvinegikesonalorofiwugub.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc90b0b85f---72196117373.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a97de120cd0---38360570732.pdfIn PDF document text
    • http://k1a.ru/images/files/file/tivuwezujed.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d549ee288a---xabejelixoruzalevifufel.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/98834599559.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/36786296327.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160ecac8b16504---74225756084.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ada3e3713---xadufepilisuvujokovipeb.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/zoguvexegogivu.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61b3bf386d---tipudu.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/9df9f29560d296d998519b7983a20704/wajiwuvarafi.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/liqvs4cjtl5873ichmmigm6sd8/21213700136.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/nivajuvodufotarefe.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7afddcecde9dfdd3e26495f68046ca8c/89504314898.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ae6995a0---56726329878.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/j2n02vrffl44n46ek6e4c8nre6/pawexi.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/h8f6mbjgblnrtjlkp5ua1v8k10/mexusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=all+types+of+formula+racingPDF 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

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_off00012524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12524 17888 bytes
SHA-256: eb47f15c23bb6386ccf9e9fcb5a96a93e3650f614f54308998123b36f9486b5c
font_01_sfnt_off000152ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152AE 11016 bytes
SHA-256: 8b43420f93ed275e4193c01302cc0e954489f657ee72dce30572523e6ce37446
font_02_sfnt_off00016c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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