Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36eebecebde2724…

MALICIOUS

PDF

71.3 KB Created: 2021-09-03 09:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3ceed4207d125108efe6f9598d8ba443 SHA-1: bbc0a74faa197efe4317cc048114b7e258cdb3f7 SHA-256: d36eebecebde2724c56c461bf0009cd64df82351af5ed1e20b3ce13bffe87735
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing and potential trojan delivery. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely instructs the user to install or connect with a remote support tool, a common tactic for unsolicited malicious documents. The presence of numerous URLs, many pointing to compromised CMS upload storage or disposable hosting, suggests a link farm designed to redirect users to malicious sites or download further payloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/e93e489fd4a46707fe62d9d76602e243/64171839802.pdf In PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074197be4684---dejatuzanemejuf.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/wazozurafasuvefar.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/wulujazirubonolovaso.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/fejomexuxedenekisom.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16088a3ef831da---kawepoxakekosorepuwejedud.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/50131910253.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b237f2f0---31017394395.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a100be081eb284ebf8f9e0ccd7adfaa3/22165949707.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/9sm5a23m2nhnroskdvrarettg7/14496635682.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/pebepejamoforevizir.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/76938310497.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/wokitifirideguradiwugin.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/e86df9a16146fc5ab6ab3d077d80059c/lesotalub.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/mitafivunapomigulajexure.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/ditilologovupu.pdfIn PDF document text
    • https://strechybenesov.cz/content/nalobefiwezeve.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/renubusapas.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/ef6fa763c2f43e7020a060157acbe040/44899088852.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/90113320179.pdfIn PDF document text
    • http://freeski.hu/freeski/file/64774894874.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac568ce31eb---74525118681.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608629c54395a---24399248760.pdfIn PDF document text
    • http://xn--b3ct0dc9bc4a4g.com/userfiles/files/21158707227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=inventory+models+nptel+pdfPDF 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_off0000b71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71E 10536 bytes
SHA-256: 0eb4a60edeaa725fc91b5be80186030613e2ca1c96a32c1c17dc30dc91bb2e13
font_01_sfnt_off0000cf24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF24 15972 bytes
SHA-256: 6c1e3e775505bd2582196ee4be2a873e603d5352f65bb7bdfc52b3d7aa04fa10
font_02_sfnt_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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