Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcc9573b4120bcd…

MALICIOUS

PDF

87.2 KB Created: 2021-07-13 20:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 98ff1ad050cfa6c17e16b89507f12a2c SHA-1: 28409d8bdab8ea9deaac8b9ef4244dc3cdffc626 SHA-256: 0dcc9573b4120bcd10194bafefcb6b0562068586407cc1f19cd99226bf68a891
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicative of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery via these external links.

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 http://apricomm.com/userData/board/file/kojuvepidofijezepur.pdf In PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6bf1826e7---rirevod.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/31c746d93b4893d63b3e9612e48917e3/17344805521.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d99999467---27925772584.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/taqbeqab7414u8atb14ibekbrs/11816912652.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/bekamijewu.pdfIn PDF document text
    • http://caramelitos.sk/files/kotit.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7467d8691---3005432560.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/woniwikapusimogavex.pdfIn PDF document text
    • http://come2menorca.com/images/file/74235630026.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ah0cseckd21qvb1arum515lfu5/49525733203.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/1545f423a2e54dd82806ab321e58ad5a/wikefax.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/m36048nach2pv7ehvosnqrcu10/94261808310.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/31933219824.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160793100c1587---pevedas.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bce023e12---vigusavovimokujizegaxeva.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/wozidotodija.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/joleposulapukojez.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a0d33d72181e7fa637cb3fe25aea1d02/nakawifivarixeruxigiv.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021619193804547.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e0ee9228ebf32b839aa67db8b7f84fbc/97018224658.pdfIn PDF document text
    • http://screen.by/images/file/zujikolup.pdfIn PDF document text
    • http://www.bash.cl/media/file/84535842957.pdfIn PDF document text
    • https://discoverthesky.it/file/tatavoduxumolabulizekiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=hymn+lyrics+a+mighty+fortress+is+our+godPDF 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_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 16720 bytes
SHA-256: 8a12c3a7e36ec33c83b0467f2664d8cf5e15b54361afb939ec8a16a89a56ade9
font_01_sfnt_off00011bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001340b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340B 11128 bytes
SHA-256: ccc7618bdc754bed93dece3a4cf460b8a0eda10125e59ab158fa492635fe01d2