Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dd9e545fb99152…

MALICIOUS

PDF

81.3 KB Created: 2021-09-18 00:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f100f6d93897396899db55487633375c SHA-1: 0c09386a55931bfa2d116e9ed50a5e3f6b48cdad SHA-256: 48dd9e545fb9915226435ac31df148fa58f6673099cebd2c33c9f238d06d26d7
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a tactic to host malicious content or redirect users. The ML classifier also strongly indicated maliciousness.

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://marlin-aquarium.ru/ckfinder/userfiles/files/92787211950.pdf In PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/41b3221f17745f071678297941e95986/65676752857.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/74068665142.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141bb30d796b---6473779153.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161332ef256057---35058222636.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/malutovitibu.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/42234923149.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/newatusaxox.pdfIn PDF document text
    • http://vagyonvedelemszolnok.hu/admin/fck_upload/file/73880533692.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/8347721807.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b8e56ea46---nututimebejepafipumewexa.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/48137238619.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/sinuxevobodaxisomi.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109010611304639.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/wubezetozebe.pdfIn PDF document text
    • http://www.culturehousesun.org/photos/file/nibijudugebasuvisis.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/32451109732.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/33832768313.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/zanewumulasozekotusejisom.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/4fbcb94464c80f9c1e8a69254cd08a10/61597452338.pdfIn PDF document text
    • http://ekouklid.eu/UserFiles/file/lofopudanuzar.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/76343469015.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/69755891086.pdfIn PDF document text
    • http://health-bridge.in/upload/file/76812029412.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=candy+clicker+unblockedPDF 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_off0000cf46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF46 21552 bytes
SHA-256: 7425fa7f38980fba0600e6f3fddf02ec425513ad68c7708475e9156964516633
font_01_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 10576 bytes
SHA-256: 024fdc03e9601dbea7b60902f1f513e95bd68487841aaab243598137cdfb3cba
font_02_sfnt_off00011f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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