Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a7dd777c28a0dd…

MALICIOUS

PDF

87.4 KB Created: 2021-07-04 06:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cbede80e7667d9e4bbd895baa45bc908 SHA-1: 32ef496c973e0618d1c98a64185b173bf60db8f9 SHA-256: 98a7dd777c28a0dd25304c20e385e1357500ac31400b24374c5e8f6f1b49347f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076e233bac00---92425500570.pdf In PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/71310825931ba452406b29c6d8035a06/60177618729.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/gebix.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/ludexewutep.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/d8f349458bf0974bc44067e7c03f4228/xiledujuxuwexajawefimafin.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608390c4cd659---kelaxikoxibizipowifijusox.pdfIn PDF document text
    • http://derma-dts.de/files/file/tujoderate.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/dc069l20kpd4roe6v5shkad5sg/zutovadurule.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/welujir.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/wazetuterezevutenav.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b1c4c2b76---23608503878.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/55769e448a1da4af9e93ce0f75da9259/fawasujozuwugafaw.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2f762b5a4470b5d7922a714150748cd9/99609966952.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/48272407951.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/64c94f8499df2ee7eafb6a24acbb46ac/kutefogojimusuvogumopij.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/3ac4ac7d0bbb86c4ac6e1bfe9af3fa91/90098963277.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/4515049035.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/zujesewobisip.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/67998867257.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/8701dcf1ebd90cd116f7383fa3ff4e6d/lamazenes.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/edc8dedb9adf400aecec1ee758794999/82219615654.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/safaje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dragon+quest+9+gameplayPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58A 1720 bytes
SHA-256: 9c3c50ca7885eb1b87261f6f74ba185aca171ae216209544253fbc3ee3acc073
font_01_sfnt_off0000edb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 18600 bytes
SHA-256: 7bd7d1f0f47fa1d6ce382d1ea53da9657526d99b618cb143068306a2f9642c5a
font_03_sfnt_off000136b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B2 11032 bytes
SHA-256: 67c69093543f0d25dd6ad094d562bda9246e185715333df36f55c7235ece8733

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