Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eda39bc4618b6aa…

MALICIOUS

PDF

79.9 KB Created: 2021-09-10 03:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c09586ee9ac024dba3197ab44219e7e4 SHA-1: 7e0281ecfdb0c22881c98327fc5c88da11ee2367 SHA-256: 1eda39bc4618b6aa554fd5ce8f05c86019a2e110411795323fd8ae962a386cd3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous links pointing to various domains, many of which are flagged as link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • 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 http://rowadhr.com/app/webroot/upload/files/51930576208.pdf In PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/lovefimasumufivelare.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/fasimanakuzigopojaki.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/kigukowedejatatalevorexon.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/5146283909.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210904123058.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/30620901983.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/61912589858.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/mesasepuxozuleduvorum.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/karidagonoguz.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210909014910447.pdfIn PDF document text
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/tojigugowufinabofulin.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ad2e069b7---jikexabikitigave.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/28292867385.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/9fec8f16d7ddcc7ce456d6b0e85a8619/94682027631.pdfIn PDF document text
    • https://sierrainstruments.cn/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/6768956646.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-10/20210910065418489531.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/60206871006.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/nafewiwiwanidamoniwupuj.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c1c63b335---goxusuxemubifipapusupogo.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/sedajuxopir.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/99468154048.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/0935278f6cda34a43580d7b781f32247/46670630439.pdfIn PDF document text
    • http://secretinvitation.net/images/files/92206378284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=screenshot+on+android+s7PDF 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_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 10544 bytes
SHA-256: 23609ceaf15e2e4b1ee08b240c6b9b7402b5905210aa136142a7c8420919ad7c
font_01_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 17668 bytes
SHA-256: 012c57ca26b2d7feee754626c9702e27c0f8bde541c731ff1dadb68004c6f3f2