Malicious PDF — malware analysis report

Static analysis result for SHA-256 3283d59e4313faa7…

MALICIOUS

PDF

68.8 KB Created: 2021-09-10 03:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 84b600e23dbc5fd024ea4ca660bf4353 SHA-1: 55a724fa267a5fac85b26e3675f08e035bffbb4a SHA-256: 3283d59e4313faa7688d870b91c18ed95d35d2ede0e8298beba71919943a80d3
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farm heuristics confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://drafthe.ru/uplcv?utm_term=stb+emulator+for+android+box PDF link annotation
    • https://mdteam.se/ckfinder/userfiles/files/pazuvijaxegape.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ef560c052bb8a843e9025ad3d77ab6cc/27094468750.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/nemorulevubaviki.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/20395709211.pdfIn PDF document text
    • http://terminsk.by/pics/files/rogelatevatikigobexomal.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/28235068578.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/wameko.pdfIn PDF document text
    • http://cuakeobinhduong.com/upload/files/xobipasenutibuveripanibi.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/13900752051.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/ravigonozedigizojokedeg.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/43962432514.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613983c6dc09c---86945518110.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ff2138b8d---lurimarepitipanifoz.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/rikarupakezogulomojukev.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_off0000aaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAACA 16828 bytes
SHA-256: d00cd222e63c1f8fad0580bdc899b573f89487bf69e3b29f0dc57a30ade7c87b
font_01_sfnt_off0000d60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60B 10764 bytes
SHA-256: 0df47d26ba0127f524d2f03f1bbb1bc8257d38f8412a4fa0cd94cdd5106bafb9
font_02_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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