Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbc217e4007eef3…

MALICIOUS

PDF

82.9 KB Created: 2021-09-11 15:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 630d660edc1e47694b1e35b7e199c911 SHA-1: ad847d40e48a58c037670f63c42a34b01d5d3e9e SHA-256: acbc217e4007eef3c419a83023f2701c233ec00a4c16d931a55a8547afcac6d5
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm heuristic points to an attempt to trick users into downloading further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://workontext.ru/media/file/xaladimanediv.pdf In PDF document text
    • http://architettogherardi.eu/userfiles/files/10800594186.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/33833767562.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/8sb5h8qe26279q3v7ar6rj5pe3/sezutuvumizokemifir.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/92750849630.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/20405168471.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/laforozetopetulipu.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/bozokelumefegifo.pdfIn PDF document text
    • http://vitrine-prof.com/files/xajiwawajemol.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/33176245623.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/zobalenoxetinufijuk.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/20040307244.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/tanovagalewomunanuf.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/7okno1129k0bf9hgutge1a8c0b/dezazamibexavif.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5hu76aik8ecalejpuc01be6psi/fumofow.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/20960085611.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/kigafavedavejalagajib.pdfIn PDF document text
    • https://cargotavio.ru/files/file/2869241326.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161318c4e44f66---rajonoxebaxem.pdfIn PDF document text
    • http://www.zdravotechnika.com/ckfinder/userfiles/files/pelavujabuzepibawafedol.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/kixigizujatevim.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/pibexeviluxotewinibevin.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/jagadekuxen.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/75751151441.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/87857125786.pdfPDF link annotation
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=free+live+cricket+streaming+appsPDF 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_off0000e0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 10732 bytes
SHA-256: 01fb285a582ff1f03331d95756a66276ff1363541b0f294879b1791401fb42a3
font_02_sfnt_off00011170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 17100 bytes
SHA-256: 40600f5bfd4f29884a54e4b01f811a7293399a2a58a8e9c8c0bdda7bfbcec998