Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dcd3692d3fa8a89…

MALICIOUS

PDF

85.2 KB Created: 2021-09-18 06:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 69543aa62e2440dc0fbc7af31a08380f SHA-1: 5e3bb03f094126d09e9eb289fa1748367922b0aa SHA-256: 5dcd3692d3fa8a89230467a4c2b336ecfa7ea6a7d8300c0fcd70bfbe16c2d5b9
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or a method to distribute further malware. The presence of a 'download' button lure further supports a phishing or malware distribution attack pattern. No scripts were extracted, but the overall structure and URL analysis point towards a malicious PDF designed to trick users into downloading harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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.
  • 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 https://catamma.ru/uplcv?utm_term=new+york+2009+full+movie+download+1080p PDF link annotation
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451fd2ea115---43753460764.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/nureralusodoxatiraw.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/30681624354.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/1433182808.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8d5f15e7d61d3271f03811b366c72983/depetavaxivafolopo.pdfIn PDF document text
    • http://arablift.net/userfiles/file/malitamiminumenizoluwiv.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/rulozawijibomuper.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161316c98db9bc---80830629662.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/91200f6cf4917bc5a6e8fe046c0b7b47/31306161180.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376747a5dc9---71043166131.pdfIn PDF document text
    • http://actinq.nl/upload/file/18504709606.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/rexiduzap.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3fe904ed7---zogosepufolefot.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/lovodowobesu.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/43774795885.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/26921397962.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/31694726403.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/41571498611.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/wusesobek.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/pumolawev.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021090323210784.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/4101983418.pdfIn PDF document text
    • https://people11people.gr/uploads/File/58786750263.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/fotaluro.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/c46d9c08941f7d962ab2c2f494ccac41/kubozumipuz.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/dojiximiwezadevi.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///24920376869.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_off0000e715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 17256 bytes
SHA-256: 7edd18aa589f8170a6ea05d14e687ad2088b9f3162f833e817deb5c0bce6cb22
font_01_sfnt_off000113d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEE 11500 bytes
SHA-256: 92663551d07e66228a90dc953ceec796e64b70265cedf7a3e39f24b78c0bec80

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