Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b19866a44b486fc…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 11:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d77dc1729f5f3daf82dc44d0367d1ee SHA-1: 278fe6eb3b0c2d465c9762e2b678cb5754236f9f SHA-256: 9b19866a44b486fcb359cb94482f87b30a05753c220a6b5c20f7e31ef54468fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or further malware downloads. The presence of compromised CMS upload links and disposable hosting suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://crysiq.ru/uplcv?utm_term=alcatel+lucent+outdoor+ont+0-210g-b+manual PDF link annotation
    • http://isotech.si/uporabnik/file/kasamonukogulututupib.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/eouuolsla6o3o4tdncqtu3l9s3/lorapapevuwidupabomix.pdfIn PDF document text
    • https://quangcaobienbang.vn/upload/fck/file/sulogisakibo.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/84310882924.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/zekexudubiv.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/baxasalitofarizuzekaboxiz.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/5754289776.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/76399084231.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/d236aeb3898577a8506344fb26b001de/pixaxob.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/petarojar.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210813132703397.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5e2c84c307e061f74a36b93482ebd56c/wojedujulukeripimed.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/lewevatimeji.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c90f4153c8d---xubobip.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26fb2558b---46040673720.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/46390219228.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/tivikexuvuwuxifi.pdfIn PDF document text
    • https://cakkue.com/contents//files/futiwatefokuduvuxamowafar.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/sijamotoxub.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/tegupagatisado.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd53bf76cc4---72588334684.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_off0000be99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE99 17228 bytes
SHA-256: 24c78991901a7ed85a6c64c81134996239f69ae2043bbfe249f7aed0f15a2c5d
font_01_sfnt_off0000eb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB64 11004 bytes
SHA-256: 0b89fdd1c8ae0702cb5c68b55587ed0c7fdfa32cd0cf51eba5cb5496032acc7d
font_02_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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