Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f5cee1754c4c89…

MALICIOUS

PDF

87.1 KB Created: 2021-09-11 16:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f7acb20afb530258c20405c35107c4f7 SHA-1: 010b7f21a26d6ff5382189c72cb0a7f593d92df0 SHA-256: 27f5cee1754c4c8966f5cb4579a041911a608f08225041f7e7a2172e48e18e9d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links, likely to obscure malicious destinations or for SEO manipulation. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=pixelmon+pe+download PDF link annotation
    • http://espressobuilders.com/app/webroot/files/userfiles/files/11737235572.pdfIn PDF document text
    • http://flomojapan.com/upload/files/27727602764.pdfIn PDF document text
    • http://rurisnet.org/images/file/65998576286.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/60122571706.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/mesubitolusewilitusepud.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/34764950137.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/regezamuzevuzisuxaxekiven.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/tupasowo.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/65143089351.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/79291531671.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359b138093e---56584145782.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f778de93f0---98721641316.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/22803783895.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/fokaxo.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/5bb2e31717cd7150d1d62853805b3886/sigipomuzabafaxisokeg.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/4ffa78d37932a4d1dda611f5bd45435f/72675385071.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109102044584155.pdfIn PDF document text
    • https://chambres-lannion.fr/userfiles/file/fagadozipajavapazosok.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/14940322282.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/76164343436.pdfIn PDF document text
    • http://jawarakreasi.com/file/demidalesukokiruvirepis.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161340ed35a277---97962762687.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/savuboma.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/70465034313.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/vajuva.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 10376 bytes
SHA-256: d75996611d2af9e965a8374766a4cc1e082f2fc84b91afeefd188bd99f72243d
font_01_sfnt_off000103d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D4 19524 bytes
SHA-256: d6a230d57ae95ff2ca257e6b207dc09b52e3a5775051b4c2d66f5d29cba92532
font_02_sfnt_off0001367e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.