Malicious PDF — malware analysis report

Static analysis result for SHA-256 920878b30c3a3956…

MALICIOUS

PDF

75.4 KB Created: 2021-09-07 04:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e1090826c44a61eb839d839aab74e106 SHA-1: 6558e6a7d09113374ef722a5f8504758fbe85b75 SHA-256: 920878b30c3a39565bdbe5d0e2aea523387f2217735175968ad00423245e5e51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely to lure victims into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it's designed to exploit users through deceptive content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://archism.ru/uplcv?utm_term=world+bank+report+2018+sinhala+pdf PDF link annotation
    • http://irk-yoga.ru/upload/files/77555864287.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/92a45fda83ccc028ad6d2f8c364ce6de/32513265079.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608b686ae9f70---63402167807.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/86427241111.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d26674302---nazarududipolaf.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/rchgo7dnjt479evhuvg04ickq6/80047369679.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/jalepofesibijafuxaku.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/bevekivanosebibuve.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/97892981475.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/bclbnhi5t8iut55touujm17ken/zevexabes.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/52381359591.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/75500113539.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/77574657607.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/tibulobolufug.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611f76ee567d1---15294332514.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37e99f0f9---16893517185.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/rotegokebuf.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/70793800483.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/xagilozuvifuxiga.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/14289300476.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/70909749268.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613037e73f292---sadeparazalexovole.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3e0124f272---50110559771.pdfIn PDF document text
    • https://slide-bearing.com/d/files/tibugisulujapibixe.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/pelaba.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/nomedazididikidubir.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_off0000c0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AD 17516 bytes
SHA-256: d550c33d3118c9149ebb9618fc0481884a0777b04d81212cea6495cf5a8e5e5d
font_01_sfnt_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A3 11324 bytes
SHA-256: b1a388d59b8fb335c2a0c986ed3c5be7a11d28913905b4a880220daa91d648ed

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