Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd36f3f24cc5173…

MALICIOUS

PDF

86.8 KB Created: 2021-08-18 01:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da577966682448e5b316995028b9a1ff SHA-1: fedc41517ecd993fb1d51b53e4b8f0b33e82cdf0 SHA-256: ccd36f3f24cc51737fb0ad6aa7f68e5ed88b361c2d3986eeccba931899886e76
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://netshopnepal.com/userfiles/file/pubobumakimibimux.pdf In PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/5963f85dac1ea736547d781dc638d2b4/nukesujapow.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/tevivixewutirud.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7c9fdba92---43067213144.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/olgnpllh0m4dv27smtnbskor7l/gemakapabowawurugik.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/lejipibuzilifo.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052016545229.pdfIn PDF document text
    • http://billsky.ee/files/file/31303497216.pdfIn PDF document text
    • http://1959blackshirts.com/clients/866684/File/86176316994.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/86658592839.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9172930c8e---dowufajapurexig.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/xuxigukobogijeladaru.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e64d467c7a4---gareruxomitikutemibozup.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/zekidotamizomavut.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/jojemojibebuvek.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/2467976306.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/49941652482.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecae75b5b94---potukikogomezomebutaxafi.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/varokevuwozunamesubev.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957daaaabe7---juxoto.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/vamevelufalozow.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/28949186282.pdfIn PDF document text
    • https://blog.openpodcast.xyz/podcast-book/ManyIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=best+app+to+win+real+money+ukPDF 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_off0000efa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA4 16884 bytes
SHA-256: 180aa50584c9e1f7a273df07c4d5da3bae1fab1d7fe7028869b584209d13025b
font_01_sfnt_off00011b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001339d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339D 10860 bytes
SHA-256: db643a8344bf345947183722c572e0ea9422ecd71bdf27e358c81c315d4aedc1

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