Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee68293f607e687…

MALICIOUS

PDF

115.0 KB Created: 2021-09-18 06:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7c8ccfdf910938ee4276b2c5ca5c967d SHA-1: 2773143276d83c2434b4e81dcd1d5d37a5f5db77 SHA-256: 6ee68293f607e6870a21a52319c557b58e2eddea64097092c4789c2ebec099d5
192 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a link farm pointing to multiple domains, some of which appear to be compromised or disposable hosting. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading further malicious content. The embedded JavaScript likely facilitates the execution of a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 9

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://abwva.com/uploads/files/lewilavasefovogesodebupup.pdf In PDF document text
    • https://ferado.vn/userfiles/file/gugopizobopimatuv.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/86772573053.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/70413733704.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/kuvagunovit.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/66070065587.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/tifipenetapewilotabube.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/varixuleka.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17881537940.pdfIn PDF document text
    • https://ingatlansos.hu/images/userfiles/file/3271677364.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/donavasonizesa.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/48740925850.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/75369921840.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/80165093558.pdfIn PDF document text
    • http://kelvista.lt/images/files/18090830743.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/a097f99a026b63f03f7e46ece3f19e3b/36748342506.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/8a7749bb42bb7cf40284cb3d7e66d8a4/nokevojelirufajukimofisir.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/taluzakeviragipotede.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/putasijopubafoxisosodemij.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/nisefuterawisotu.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/lunubilel.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/18535845483.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/076bb846706ab3f866cfb6785a7bd664/11038837102.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/godipeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=screen+recorder+no+ads+old+version+downloadPDF 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_off00015144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15144 22936 bytes
SHA-256: 36a5a48f91c684007b3e93a8a32e43348d05a87fc97636a65c921fb6b618f130
font_01_sfnt_off00018dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DD4 10492 bytes
SHA-256: 3029839eb865b3d5527bb0c1fce66ecfb8d90636d215469e8ca93c32b9197b45
font_02_sfnt_off0001a5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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