Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3acaffdd50e03bd…

MALICIOUS

PDF

88.4 KB Created: 2021-06-28 03:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9befcf636e0a16f0dd8e3b662bf9b987 SHA-1: 6eaf5f5aa33ccdbfd721b40b853e9a031be15fb0 SHA-256: c3acaffdd50e03bd16a0eba212ae3b8fc93abf061b12feab438f06ebabe90cda
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, directing users to various compromised WordPress sites and potentially malicious URLs. The content is designed as an advance-fee scam, likely aiming to trick users into believing they have won a prize or are due a large sum of money, requiring them to click a link to claim it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://oniceh.ru/uplcv?utm_term=tenderness+after+c+section PDF link annotation
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/5c5890626cd9ed74c8989d6e9896aa42/jujut.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/7i7gdhute0qrh44mjuu1al7h0c/waxonewisujojowaw.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/c15491b0e27897759d66c9fc29182b04/nifofovidinelilaz.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/4635176813.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/tukopubipixezuvozafu.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae94042be---bakevabaxurupudotokizak.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/97729172690.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/6fe57d216274aa2309d4d4196f4cad76/79242220606.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/42694492813.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16092d5672022d---82089556935.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/6352f829c2fa44071e8ec39a3db68176/99078429241.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/0e5bde722f86e014838221568cd9a942/12853397882.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/damuxodeloritebat.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160839d76628ec---kijixojozafekaji.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/padovir.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/87239310328.pdfIn PDF document text
    • https://elektrona.cz/files/file/76792386996.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/kimegejobi.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/quvgjhbf1m5gtugpma6vqppknn/jubopabuwiwekujirit.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/35257084709.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/gaxodefevizusar.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/27382795197.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/75109663b0134f1f31df5c205829f792/56925190172.pdfIn PDF document text
    • 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_off0000f7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 10388 bytes
SHA-256: c65bc7bd7485a4f8b73e19cd0aeaf8575da12dd658a8f86597985786420e8b1f
font_01_sfnt_off00010f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F51 17336 bytes
SHA-256: c4e740c4235de789a3c2d847c622b59d2ee6eb3b5d91be9dc4631161d42276af
font_02_sfnt_off00013c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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