Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe602c5e8f38ef2c…

MALICIOUS

PDF

68.7 KB Created: 2021-10-01 11:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0b397850df126ff38b151a112db263f7 SHA-1: 8f1cfcc73bd56119aee2168fceb04fa8aa9f6d62 SHA-256: fe602c5e8f38ef2cf85ff15a4c8332094477ef18a0d4fd2225fe24959edac350
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. ClamAV detection and ML classification confirm its malicious nature, likely serving as a phishing lure or a distribution point for further malware. The presence of embedded JavaScript suggests an attempt to exploit browser vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chcial.ru/uplcv?utm_term=how+to+screen+record+in+cellphone PDF link annotation
    • http://tindangnhadat.vn/upload/files/93958431209.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/15616423777.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/lavekizatur.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/d751f692b4ba2845f3d210150a52dd91/sinamibovavaxin.pdfIn PDF document text
    • https://qkon.ca/images/file/19519436793.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/zitelatupeni.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614219bda7106---tujipegatujojos.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/mixajas.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/13bc333bdc6712dbb7f35626b11ee7e4/dafulesepudop.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/a8cda80ad74c54ae13f327f0a0e84c9f/65493258394.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/buwerogesuganemenin.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161316835a0bef---35456750242.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/beziw.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/pulamuvuxa.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20211001105743568.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/jalesirudanowozi.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/14458952155.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/sagulewijem.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/5804396fab101aaf9c16512c8fe728cf/fetodaripipapexob.pdfIn PDF document text
    • https://venus-forever.com/image/files/gatofu.pdfIn PDF document text
    • http://wizclub.net/upload/userfiles/file/90561926300.pdfIn PDF document text
    • http://efeteknikyapi.com/userfiles/files/puwopotuku.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/vegefowewuxabemiwarirat.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_off0000aeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C5 10528 bytes
SHA-256: a9482959175755c5ecb21956085a6e180875d821a56e564de82a13d19be62e11
font_02_sfnt_off0000dea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA4 15304 bytes
SHA-256: 162aa49f69e8dfe35958235ccb2de37cd2401c26ba08dd3e634ae0b8ad6b52d9

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