Malicious PDF — malware analysis report

Static analysis result for SHA-256 02dd2d3105fbfdf3…

MALICIOUS

PDF

76.2 KB Created: 2021-06-23 21:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e9e7d0a8f6173b26ad860d393445096a SHA-1: 21d5223c48d298ea4fa610b7d1ffd5f983ec5426 SHA-256: 02dd2d3105fbfdf3e51263b9d1344efdf409d456e3cd2670143f2f9897a23b76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d27443aa1b---zuleze.pdf In PDF document text
    • http://flygarfield.net/userfiles/file/43271324093.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855327464a0---56882343053.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/0b84pkn4icl8mhqdljd1ijj9hu/91096762641.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/12363196952.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/finovobigixakodumus.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/redafasef.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/01fc86af233163bb94c33e501e9c5798/wimunirevobiva.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c728804afb5---kisaxogipureratizerimu.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/d196d62d4aa4004b8a1481bdfbc866e1/naberasozofegos.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091774f3a90f---313556582.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210531060245_1674547177.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/skd3n7c5vq27c2topdbju38qkr/pedogazerurunaxuw.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/40d16cbcd77c0c6b767132fb738070e7/18642473601.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098849916673---54560088312.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c921202b9---41781007009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=new+super+mario+bros+wii+romPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65F 5132 bytes
SHA-256: c18153cbc791b8d24c1e3240b2b5a50a6906baf40a7866dd20aaf0d319d06192
font_01_sfnt_off0000d7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C2 2904 bytes
SHA-256: 1bbb995726c00b9812a117f774d6eebf4996b444b9057f31993f9a83f058a1cd
font_02_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 12376 bytes
SHA-256: 6e10793e6aa07f1b11c3806fdf44a64cd4120a6e84ed1413ffcc7603a5af6e26
font_03_sfnt_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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