Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae66d052170b1ed…

MALICIOUS

PDF

91.3 KB Created: 2021-08-05 15:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 80a9daa8a365cc99aa9dd38c94678ec1 SHA-1: 2560e398c237b343331fa841fbb765a7c3998523 SHA-256: 9ae66d052170b1edcc34ea81b659835288faaeaae3e60a31effaf87c84825b69
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The file contains numerous links pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute further malicious content. The presence of these links and the overall structure strongly suggest an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/e429fje4f67le3v2tddc1eau97/ditav.pdf In PDF document text
    • http://valsadindustries.com/userfiles/file/38642844151.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f2b0cf0fa8b---xupomofaxakexivura.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c767c5e83a---98226483447.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/usbh6prqvlp615bs3lpr9n0esp/gekumepuwaxam.pdfIn PDF document text
    • http://ohstigers66.com/clients/d/da/da15611725e7ba20b6827cbf2e24f87d/File/35597849571.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/f04k511aov7bcn5hcjl3mflvgb/99611720926.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdcda308d7---56985580064.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/refusevu.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095216d00a8d---vamekisiralimujodoboke.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/86487097176.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/957a5cac804d01e189b4a12217578c91/64689641395.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a4b788d4eccd1cf8209f95044380b56f/37242608155.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48cde86db0---41193668368.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076e9a5ee829---witogekasovimaxiwule.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/40d99c60b9eefacfbdb2bb773f0fd6e4/89570973273.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/298b3cae4a66a82fa3eb993760d714cb/26359943885.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/kubusizoz.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/68440932149.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/3d8htjkfne9ufb48sgjp5b1v0i/73772880107.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/pizepizekit.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/dofavakuvokurumofazosudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=miraculous+season+4+episode+2+streamingPDF 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_off0000fd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD31 18148 bytes
SHA-256: 0410065e23d162648ee8a7459d6d4565ba7afc629d15a33f73ce52e2fcb0ab49
font_01_sfnt_off00012ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA4 11148 bytes
SHA-256: 2c43b5abc8b4d136a5ddc1b93ad2f15b696581abe15aa43b676ad343e7c9b0c2
font_02_sfnt_off00014696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.