Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce6cbd3e408a04a…

MALICIOUS

PDF

88.6 KB Created: 2021-07-19 00:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 217f186739bdf3b26b1c0ff6bb47923e SHA-1: 62a119f0beff9a6802d1fbf22268e2ffab94df12 SHA-256: 5ce6cbd3e408a04a1d96b3450fb3b4c00ba463d3f63f711c25b47f23323b5c80
164 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains and compromised CMS uploads, indicating a link farm or phishing attempt. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection and ML classification strongly suggest malicious intent, likely to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://iamtimeshare.com/userfiles/file/gajibijosowipiteba.pdf In PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/2cjmlgongkcajh1pq749fqs9s5/88817785677.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160dd69cbc6bec---jazepif.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/zanivomemopoxuxotajuk.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/47266424377.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075d44456369---povuruno.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///waxal.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/bowadepilamokuzaxuzage.pdfIn PDF document text
    • http://tumonjfk2020reunion.org/clients/f/fe/fe8b949e9fe7e5065ccade199761aacb/File/37986842719.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf31277f92e---sogifinixunolenifuvepo.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/5b454d099876847828aef7295a76abd6/xelukopemoj.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3da3393de0---11811078914.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/komipepaxiwizodowokexu.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b491814a0---43430216133.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/90605026528.pdfIn PDF document text
    • https://negaratoto.com/contents//files/65244181910.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/92406238024.pdfIn PDF document text
    • http://pxmonastery.org/CKEdit/upload/files/munedepemokukinamuwin.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/xutigaregobotivave.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///20210508174745_830715060.pdfIn PDF document text
    • http://iphysiology.ru/upload/41833258893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+install+gta+5+without+license+keyPDF 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_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 18388 bytes
SHA-256: ae3767cc9a03b642f57e48920d577e58119a3275d5903357cff0cd70628794c8
font_01_sfnt_off0001239d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239D 10924 bytes
SHA-256: dfa026520eec6869f80f6bca121d37cf395aaa86e5bae033205a96a811972257
font_02_sfnt_off00013cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1