Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadaaedc2e70b9bf…

MALICIOUS

PDF

81.6 KB Created: 2021-09-23 04:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f917b1e8a5303b5e78e19a9059f5c00 SHA-1: e297463add5d366addc68f48cf8b69cda102883e SHA-256: dadaaedc2e70b9bf27445575b7db8b8c23e99d56079582bffe0ecc527e769470
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI links and link farm heuristics suggests the primary goal is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://crewmak.ru/uplcv?utm_term=cs+camera+scanner+app+download PDF link annotation
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64218369296.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/nufofedoberuwal.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/gedurube.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/labegutu.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/102046178073.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/64618992141.pdfIn PDF document text
    • https://digireg.org/upload/xogujulabokewalexotejodur.pdfIn PDF document text
    • http://hnht-electromagnet.com/d/files/35453808678.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/551533ee1b60a64941f6aa133365631b/suxobolapede.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16130c989dc33a---jekojelaf.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/nalorav.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/35057469824.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/25892942099.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c8e22f17fb261487c6bf7a2002de6ccc/fodowibevowujojavame.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/rebilugejisonalemaxajif.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/bc7o7a3gv1tisegjut7ambb0ug/43056152773.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/86760553885.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c16644205---refudukolif.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/29326692139.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/8638605304.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/97858703087.pdfIn PDF document text
    • http://jar-ted.pl/file/kumepug.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/58adc94df2cac92a2b6d201743053620/nizafevit.pdfIn PDF document text
    • https://magatek.com/documents/file/jisuxekowu.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_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 10600 bytes
SHA-256: 42af9045872afa2d5767cf2c97a24b970c2b542fe57ebfae8bac1dd3983ae562
font_01_sfnt_off0000f3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 17408 bytes
SHA-256: 6173689849e1f8c755aeff0e96a73a16d312a0ec04320d2648401f882444f8f6

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