Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2721b9aae103fb…

MALICIOUS

PDF

72.9 KB Created: 2021-09-12 17:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 127265df03304f7fae2aa2be1fcfbc55 SHA-1: a885a505f7d72b2f1125204f6c6499574dc3cee8 SHA-256: 2e2721b9aae103fb5c192957ad33bfb56c9a1c21eeb75b8267672c45ce79dfc5
216 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ML classifiers and ClamAV, and it contains a critical heuristic firing for requesting recovery secrets. While no scripts were extracted, the document's structure and numerous embedded URLs suggest it is part of a phishing campaign designed to steal sensitive user information. The presence of multiple links to potentially compromised CMS uploads and disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://xrtradingfeedback.com/cmsimages/file/66348563417.pdf In PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/k91deb40ftfok7d182nv56i5rf/rokaxisumizezilesejipe.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/zebonuju.pdfIn PDF document text
    • https://ratosatu.com/contents/files/61548760268.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/03d31471278deed60c8f3d89ca2cbad9/38197275495.pdfIn PDF document text
    • http://votejoedestefano.com/editorData/file/rupuvezifix.pdfIn PDF document text
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/situjijuwilu.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/gimafanukifelumukilir.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109041104251131.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4t1bc477e61de438e3rt6i8sv7/kezorefuputaka.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/15763918007.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/638b517d6323435f5a37198fd90e4c0f/wuranidovekazef.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/silutirek.pdfIn PDF document text
    • http://glttek.com/userfiles/file/zuritisedurupujitowumunab.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/76702153722.pdfIn PDF document text
    • https://demetraproject.eu/ckfinder/userfiles/files/dulokuxazabigobo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139701f7ff56---silataj.pdfIn PDF document text
    • http://www.siposferenc.hu/html/kujuv.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/56582038187.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/mibujow.pdfIn PDF document text
    • https://banghenails.com/upload/file/fopafotegifatewetali.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/79100904998.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/kesuvuwasesoxupiwob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=max+payne+2+the+fall+of+max+payne+androidPDF 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_off0000b8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A0 10924 bytes
SHA-256: 81ef6354f836c23c8029b897312b16c42f6e34d7668c902c2a23d5cdcaa11dac
font_01_sfnt_off0000d1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C3 17152 bytes
SHA-256: a4fc01d4be64c90e5088b54e97a1d569ee69ef316970af79febe252fcd1cfeba
font_02_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1