Malicious PDF — malware analysis report

Static analysis result for SHA-256 0970f8fe3f7b0283…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 18:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: edac2cf835644ad491fe62d17f11f682 SHA-1: 1ff291d36ccab7168ec8dbc5546f78086c085f03 SHA-256: 0970f8fe3f7b02831abbd6fce92e7eb48ed3c53ca24a0da90b694032d2ff2818
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a link farm designed for an advance-fee scam. Multiple URLs were extracted, many pointing to compromised CMS upload directories or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body was unreadable, but the presence of numerous links and the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://kengosushionlineorder.com/uploads/files/jeturuxizikulib.pdf In PDF document text
    • http://citescolairedeledit.com/include/file/zolubegevukexinabob.pdfIn PDF document text
    • http://cepsagibyachtfuels.com/images/photos/10763981809.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/11f3f5201472d3af076f50e7e754b2ac/10086234824.pdfIn PDF document text
    • http://gdgom.com/upload/file/210624220112651552ho3gnyoj6mo5.pdfIn PDF document text
    • http://fitviewer.de/files/file/tosowulejuxomifaforelegi.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160705ae4a915d---6592439156.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/kakododexibifazuzosibofim.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f913a4d9a---mefapizisubenerobopom.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/bowexujegubogizijapa.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/714230403.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c25a3d7d8---guluwunuxulidixuzebevinir.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/1b019b6c56823889a8590dff6fc08b2c/66619672665.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b497878160a---farituxuwog.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/bonomikanuvovosebozopizut.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/wigulelemufevosivegikefa.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/gizatopivejiweloravav.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/d790924f403baf6a62f49d91101266f0/5170298311.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/82f379d7f5024464470489fd02a4c3d1/50664398207.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/mipininapufevevelax.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/73661476714.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/refuresetukezipez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=self+evaluation+examplesPDF 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_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A3 16672 bytes
SHA-256: 0dc1afc5c3698f41a7c8eb40ced00ee3b1114252820aaee7d143f69c1ecdc5c2
font_02_sfnt_off00013010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13010 10760 bytes
SHA-256: 0305852dd9f608d62a221a837d62ff391e479ad4e3a3d869a7182c4de4555c11

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