Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6b3cd65455cf11…

MALICIOUS

PDF

119.2 KB Created: 2021-08-06 22:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a8164fbd26ae4bb8a8ab1d4ad022af18 SHA-1: 960e6f065f678c66227971c62f244099c33cab3e SHA-256: 4c6b3cd65455cf1122bf8b5dd9962b1bd9e5c631270a0f7d18821094d0c8c7f2
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or malware distribution lure. The presence of a 'download button' heuristic further supports the attack pattern of tricking users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://spostojow.pl/userfiles/file/pexaluleziguzefegesexezi.pdf In PDF document text
    • https://stratasphere.online/userfiles/file/wezupawax.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/figozenegatikijo.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5210f08db---19568070321.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/39203044316.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a21c685cf---37026623906.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/4b2b657aa3f05a5b1f1a35b2e3222eaa/98522881030.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/povofemoxisudotimolijedo.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/22214878459.pdfIn PDF document text
    • http://tinnaduraflex.com/uploads/files/solilotukowevorebo.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/59123881188.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160956ee96a306---56050673474.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/r7i38irdrpcrunpptrcniu6ok1/76941551403.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16089816327159---31830135042.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/91672004851.pdfIn PDF document text
    • http://besteva.com/upload/files/93625223766.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609451ec3a60b---pebidekixesemafuzizixa.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a1e74afba64b7e2890e3ec9e277c4fc9/dexulufokapulajimeda.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/nodajo.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd451120aa---64152987640.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/womil.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/34124718867.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+ultraman+fighting+evolution+0+mod+ufe+3+ppsspp+androidPDF 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_off00016824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16824 18384 bytes
SHA-256: 0bf8c7742850863c7741d34ed02e29e78da9753a1985a2ba2ba6f03da57e5baf
font_01_sfnt_off000198f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x198F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B10B 11492 bytes
SHA-256: 4c14224d5656b86150339e398ba416b71cdea84ae2015b8f4bd4b04fcb114526

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