Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdae54396923656…

MALICIOUS

PDF

75.9 KB Created: 2021-09-08 01:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8297e7e92d3829bfee1faca7e90194a8 SHA-1: e3361e4975fe3173c138c8d5856439b241ec822e SHA-256: 0fdae54396923656f955c097793bf3e2052caaee78fab6c1b4bbaf17b0a80379
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature. The file's primary function appears to be acting as a link farm to distribute traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/mesezotexefojufa.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37a3f55527---nepemeneju.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/lupojabibexeb.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/nurajavevironijo.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/daxawojerasog.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b34127147c---xenibuvenaredodobine.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/rexadizejisigatixa.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/vsegh4s5mbv4f4h264l558psj4/pisoxidarafate.pdfIn PDF document text
    • https://plasy.com/uploads/file/wobemefasutedapi.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0044fd7399---kufipitak.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/nutixesikaf.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b15cce4e18---rogejurobijogedululojev.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3165c1b06---11044926708.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/49206239380.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071aa4c5bf85---wakakesinarerezokibaner.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/54946020882.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/dlhe7mdqr0m9g74fvpctoov5ld/35737564976.pdfIn PDF document text
    • https://renetravel.ro/images/files/51037507149.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/14800448318.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/zeterikedewotoguwore.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a684c4cebb6---jenemenetuzuruno.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608571d17213d---gefetidixixibaloto.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/14009119330.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/24169692782.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/15958255437.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=little+red+book+of+selling+summary+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_off0000c582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC582 16488 bytes
SHA-256: 5cc9c391e08e47a2310be0762e431663fbd8d1b3b88e3b4a5877a0d86d2398d8
font_01_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10813 11244 bytes
SHA-256: 33f21fbb65ba927b0ab97d2dcfabec5783e6b8eb90dd6ec39659fb1b6d306512

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