Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30e47c880bbe35e…

MALICIOUS

PDF

71.7 KB Created: 2021-10-03 06:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3a71ab7df991993695f0da2c8d475967 SHA-1: 28f228e8e253dedae4876494819c90dd573a1a2e SHA-256: d30e47c880bbe35ef77db1a920eb0274699440a1d0136f17f672f725ebc3f3ae
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URI heuristics and link farm indicators further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://ansing.nl/userfiles/file/22256492017.pdf In PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/wanuze.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/67530106016.pdfIn PDF document text
    • http://kd-council.com/upfile/files/9253532508.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/mapamigisivujup.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1632617852.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16155950b4c9c5---80166613929.pdfIn PDF document text
    • https://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/56488604440.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/nuziw.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/29238e32b3b994807584d815df5ea46e/tafexirolapafikidufifaf.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/99129084708.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/lamosojolevifupaj.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/pixabo.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614fbb7e59bfc---kanoxawofobupan.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/josigimosip.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/giragokegejizigovokes.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cd00837f86---xaligulosuvofizux.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/rmj3bbqk0v53nlnpbjs4o1hs15/51891961417.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/68313530019.pdfIn PDF document text
    • https://millvalley.com/wysiwygfiles/file/62207874296.pdfIn PDF document text
    • http://e-store-sys.com/userfiles/file/pojop.pdfIn PDF document text
    • https://greenfins-thailand.org/uploads/file/zesovasotirazazimulidakop.pdfIn PDF document text
    • http://mopron.ru/upload/files/18400241860.pdfIn PDF document text
    • http://ahchala.com/img/file/56168522839.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/nanisoz.pdfIn PDF document text
    • http://biggedefense.com/userfiles/file/27213552537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=delete+all+records+from+table+sqlPDF 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_off0000b322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB322 10728 bytes
SHA-256: b7b8a97000cb1bf377cfd14c9f3bb319afcbf4d1c960df39da43170d3b64c763
font_01_sfnt_off0000cba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA1 17476 bytes
SHA-256: b540d63b57e9869f534c8c0b85e6266554441747671bd23b835859e6548c015d
font_02_sfnt_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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