Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac2d38d4b253ce1…

MALICIOUS

PDF

84.8 KB Created: 2021-08-05 20:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8d1359e782c46c533523c48016d413bf SHA-1: 099cc43991a21a86156e2a8437742f2c94f4d07c SHA-256: 6ac2d38d4b253ce1cc3babe4070de682fb38f1012cee9bbda4f1c81656693b44
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a variety of domains, many of which are identified as compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to phishing sites or download further malware. The file's structure as a link farm on potentially untrusted domains supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://ghgunclub.com/clients/f/f3/f3036db30fa8ed97f94f648fc77c1040/File/43198685564.pdf In PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948fff1b756---26256644090.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/2263257521.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/up9j5497oqjg17gva5itr25190/tapanus.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9d1236d5778a345752b3217a27ae2268/60191568606.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/43889636400.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607883d7bd6e4---fatesepuwokomefidowakorif.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/aa7dd0b3pmgco2p4fd3s7idbc1/gesodafi.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9ebb6be57---5237312335.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/74300716963.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8da2899ff9---2676456687.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/xuzan.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/48802565922.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/7eqkif1r7vljm8tmqgnjhv6qm0/92507871574.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/kopovegarove.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/67188102523.pdfIn PDF document text
    • http://berbun.com/user_img/file/84738839373.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c15963676---6500281187.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a567aa99c9feec00bc11eb2f9e9b9b85/41414919534.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/51284014213.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/romolejaxi.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/81341687150.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/zovataloxowere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cuales+son+los+diferentes+tipos+de+sistemas+operativos+que+existenPDF 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_off0000e771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE771 17332 bytes
SHA-256: a81b956c1e00c934b24f5b5deadb5c56cf291cae2b27b61c9547e8c0711054ac
font_01_sfnt_off00011354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6B 11104 bytes
SHA-256: 4d4a47392e1c4d0f8f86949de96ede93bc1342bc3d4fe123d3dd51ddbaa8b8c6