Malicious PDF — malware analysis report

Static analysis result for SHA-256 f806d65b965540bd…

MALICIOUS

PDF

84.2 KB Created: 2021-07-20 13:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bcf487338af91560fc0a01d0e0361c74 SHA-1: 52f5936359e0b359346affa389d1719e32cbf80d SHA-256: f806d65b965540bd6e930059fe5ccc38ab14e964ec8c4a5b31afda83845f05fd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to potentially compromised websites, many of which host further PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect the user to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/9fae6f6cbd22f348e49d3802ba0cfe2d/rusetoposekimekato.pdf In PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/jitifedebedolezajiguru.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7c80c6bf---5229331093.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/1189597065.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef830d4357---85756263039.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/4s8tj0nekp5l3ssp98b6ou6cs5/diluji.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/ed15260d03d4c27c149b54d8e0aa44c2/regumivunefiwinuzu.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b135d6c9f---bazofipag.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c47c8112a---mewudubofupunod.pdfIn PDF document text
    • http://carsonandchain-ip.com/userfiles/file/zixotofimonaxasovotizije.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/42107756514.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/38630776444.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/15204138422.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/filozefaxuba.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/rerozidukikeweditizipi.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/pkb6dj5h54m6bs6krt37b8fvc3/25218749545.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/08bb0103d611c2547c6e9b0a2a952d08/50445330726.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/kuvota.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5ab616b8e---geten.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/74911586479.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/5d3d7779d452bf67d6f0855c2b3f0e5e/sixavaxozajivivenobewoje.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/fezojabokifujinexiba.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/zumogenasinifukotoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+remove+an+extra+page+on+wordPDF 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_off0000e480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC97 10676 bytes
SHA-256: aae2da073495bd01345c07e6791d0bb0673671bb63478cf440eb30f2721456d2
font_02_sfnt_off000114d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D8 17120 bytes
SHA-256: ba336606d7441652d3b86a6e3eb911c15ef512a68fb02a62162d53fccecdf99a

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