Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee80932bf92aa09d…

MALICIOUS

PDF

69.4 KB Created: 2021-06-15 16:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 31b98adaa52de8bfef128a30fb7c2d90 SHA-1: a990e9f0d0fec5d2b5ab513f33ce6278f01b64d4 SHA-256: ee80932bf92aa09df991098f4dc97d033019e8764087a94a4788222beea5506c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to multiple compromised WordPress sites, likely serving as a lure to download further malicious content. The presence of external URIs and link farm heuristics suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crewmak.ru/uplcv?utm_term=download+subtitle+indonesia+kung+fu+panda+3 PDF link annotation
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/d70211830e735c9b0a6096debc4a8def/67350819014.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/ct2v2nk0sde479ml7rhbtkiuh5/12599426868.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/56073096424.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/54624455951.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/sinexogokibo.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e47e6bfe1---nuxox.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b41642a09fe---webuwexekilumokisasojifan.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/17lj3uhf9d4erllcck077ncff4/37845180843.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/ecbebac21d546c5257d2aaa81328c7a4/jizojigomibodufumegopimaj.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba17b0a5762---dafegikejamuv.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/27tvhoj85j491gbtr8p0glb457/69180427895.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/lagupobageviwoporosimupo.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609891bdb3a5f---gawadosexir.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/c93046d285d9b93e971ff4c22fcbda18/xamigagenolasenadidowa.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/b5a883430860f3a47c096803c3083fe6/2991890490.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/al5ghjg03a35dm7f6mjirhokut/sabip.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/vufabefasipo.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/4be66e97fd43485bff492482a8feaa5d/romogare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 5572 bytes
SHA-256: cd955da05edfad838179086807b9542aa2fa4e5585efd258987e025c8c428aa2
font_01_sfnt_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 11268 bytes
SHA-256: 37f69ae2164df8539a8cd2099e5cf92f5578f4406d20d41d831ea2954f29eacf