Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea38ccd303d15d19…

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 06:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6e00cbe9fea4e3523b4cd2d061074faf SHA-1: b1b330718f8a02c407a15daf4648c48334ebc807 SHA-256: ea38ccd303d15d19609a5cbe609992f54bc70a602923af1212961429684cf0ff
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of a URL with a 'utm_term' parameter suggests a targeted campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=shadow+fight+2+mod+apk+update PDF link annotation
    • http://pooq-design.com/app/webroot/fckfiles/file/29139767095.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/buxitoxupi.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/82678903808.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/lubegeloge.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/54e74972c742006555aabeb481e46403/fizimakoragawa.pdfIn PDF document text
    • http://strahyi.ru/images/file/gisow.pdfIn PDF document text
    • http://vucert.vn/uploads/files/wurerenodiw.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/takenewijuvi.pdfIn PDF document text
    • http://digifast.cz/userfiles/jupuwiwixunup.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/kunajuxemibowesekukeridu.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/47057279986.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/xizikupisulagut.pdfIn PDF document text
    • http://architettoannalisatinelli.it/userfiles/files/66486224108.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161313f671ee8b---lokowizuxaz.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/kurizagipoxunujan.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/vutekudozukuzi.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8128720e85fc8d64411842006b1fcedd/86890701515.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/41145641264.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/89488207868.pdfIn PDF document text
    • http://freestyler.cz/img/file/voziwigusaxarodutiditalor.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/59942480778.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/22682474913.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_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 11000 bytes
SHA-256: 8048d7ffd8cfa604b6535e11b969ae8d67b00dca3d8da2ef322e9047a8284665
font_01_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 17228 bytes
SHA-256: e8b6c8f53f258e6216ce1509255a3ad23b2861af78d75f1f9d252d170ce83713
font_02_sfnt_off00012746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1