Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a5996361ff2cc2…

MALICIOUS

PDF

65.0 KB Created: 2021-09-23 19:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dddf75f4eb4a72c090f7502dc963cb9e SHA-1: d8c63368178bd4f1d68082bf15df05a1f8a2c3e6 SHA-256: e6a5996361ff2cc271278a5144e5cb06139cea8998d3b9b18c413c0c6a22da99
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification as malicious, along with heuristics flagging compromised CMS uploads and link farms, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the PDF structure implies potential exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5168

Heuristics 5

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=dragon+king+fishing+mod+apk PDF link annotation
    • http://turbotechnik24.de/userfiles/file/dazizepamanifi.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/27653219363.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/filiz.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/pefisowovivaxowuz.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-07/images/files/jorazakisapas.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/55254099082.pdfIn PDF document text
    • http://sinostandards.net/upload/files/91784119459.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/lebuxotetozemalapiwita.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ac9657b653---27819757479.pdfIn PDF document text
    • http://brucemayrockinstitute.com/assets/ckfinder/core/connector/php/uploads/files/tebukosajunadedut.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613933ca4b46f---lomovevulewemanowitopo.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/fajepapozerisu.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/47397152191.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/fujivugesi.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/lusatuzoxogajobizolid.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/mufate.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec2cbe53c0---munirotanoferasiva.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/48150870481.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/3b7b642997070a01c45d2924ade1d392/fodudunoxinogojinosesew.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/924609997.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/vodiwisalamojukas.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/35a54f9cab56762a8c998f0ba9950d15/tolixamutafeduwadevosapew.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/4d290ffe63dd0eac30f8807c69ec0853/pujakubijizaxevi.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/26662346048.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/vofuzubivitikubip.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/54371262681.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/3248314312.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 21388 bytes
SHA-256: 48c8cbdfa054c1fa5b2ad33517dee6fa5e52a393ba6b844f5ec3528fff4c696e