Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e0620f0a940429…

MALICIOUS

PDF

85.8 KB Created: 2021-09-05 19:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3af82ebb2f09a431ac244459b780721 SHA-1: f109f78539ad6a1b7ad22b2bdada026b710b8be8 SHA-256: 65e0620f0a9404295b0ed554ea7642aeccfd9c5dd54274d7fb70e973b58bf92d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ff2cf02f7---272455541.pdf In PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/16414689145.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/49aa9024c3744096d56938eda84d2c2c/92258666209.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j60445l5kf4u77k9qq0eljp4u0/bifurilajomosuxewadom.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/2e7f1a4a34db8507e17a23aae238fab4/54272505509.pdfIn PDF document text
    • https://citytrafik.nu/images/file/20960730016.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/jugonudobadad.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/giposibapadokimoxez.pdfIn PDF document text
    • https://unosms.us/userfiles/file/59508044647.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/madukezazojijerade.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/76760590005.pdfIn PDF document text
    • https://mattress-leader.com/media/nidesuf.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8a4a6cc8cd4b76980689a5197a0e8bab/47169315392.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/nokknasnc8qcvu25guju5m4h2s/20314727964.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/dawomi.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/55168323158.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/42117535443.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/26524257047.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607575428f3a6---kovadijizom.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/41063884785.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/60746119045.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/sitigekudadaluligiwowa.pdfIn PDF document text
    • https://datajournonepal.org/files/tuterowitefulel.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/milego.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/zofaritukapozajutupoxenik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=preschool+colouring+worksheets+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_off0000e909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE909 18256 bytes
SHA-256: b52b83cbe9e3a41ddb3ad0bdb4d37229f0f878e3ff2b4fb59b82fddc03994c74
font_01_sfnt_off000117d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D6 11016 bytes
SHA-256: d6f47c0d8a10e7095a0f8bf3947f76f0159e5ee95ca9c44e79f1007738687a49
font_02_sfnt_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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