Malicious PDF — malware analysis report

Static analysis result for SHA-256 e05074c10529f29e…

MALICIOUS

PDF

78.9 KB Created: 2021-09-20 02:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 26dff548f2232070793467f3236fa0b6 SHA-1: 59cbcd04c12008ef19af75f6f2cd3770a0808015 SHA-256: e05074c10529f29ef7dec8e155bd94aa099dc7d60eb2d63dcc59d2038b9df856
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 disposable hosting or compromised CMS upload storage, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://408of53crownstreet.com/assets/media/files/95643491522.pdf In PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/91982936594.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/xafilafig.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/fuvezejilosi.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/rivafilu.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-14-05-57-07-ULhS2CZl.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23324800922.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/89313812013.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-9-19/20210919171151273218.pdfIn PDF document text
    • http://builderall.info/userfiles/file/jajewigimutavo.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/rapuvejipepodikadoj.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/jejofezu.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bfbbad72a---kixubetobudamisig.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/bitasusakix.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/47273467766.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/veter.pdfIn PDF document text
    • http://wellnesszeewolde.nl/site/data/ws/files/76165084614.pdfIn PDF document text
    • http://1night2day.com/UserFiles/file/36931218001.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/3697275747.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326ebdd9e15---9179303814.pdfIn PDF document text
    • https://nbretail.com.vn/ckfinder/userfiles/files/degiwuniratirekewu.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/10507075592.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142b1cc22b67---67222888720.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=apk+free+dishPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE8 10140 bytes
SHA-256: 8832ff60d9eb0ce6a3f5af5aba50a2f819932fa5e2dae0eda2b7cc4a23853db8
font_01_sfnt_off0000e4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 18864 bytes
SHA-256: 813be6e6289538a9d386df7845e74d01980a5c289e2178c706231c0aac01f35a
font_02_sfnt_off00011639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1