Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbc76b10e5ebc07…

MALICIOUS

PDF

85.2 KB Created: 2021-09-11 01:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6df4da7d9f50d63ba85e9860a4624a3e SHA-1: 933677fd66a7962303525067c102011d82451632 SHA-256: fdbc76b10e5ebc07315089058d3361e6b74027ee7e418b58a04e7e758b2c7f37
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many pointing to IP addresses or disposable hosting, suggesting a link farm designed to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of embedded JavaScript (T1059.007) further supports the potential for malicious execution within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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.
  • 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://datenglagi.com/contents/files/jezirenojezeza.pdf In PDF document text
    • http://pushgroup.lv/userfiles/files/sovedelaza.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/somovilowudirikufekovon.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8c2d3d402---39184771467.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/ferujexeluvev.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/75617117382.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/21452028858.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/08df27f4e5b1598455bc3f1f5c80137b/92948899110.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/97511823694.pdfPDF link annotation
    • http://holzweiss.at/12123297212.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/fivur.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/noxejagadafutizim.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/fusetigoloruzuva.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/lemutokilozatapa.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/41256390582.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/9cdfe37f2bbe4471d7c8f9d921a37b4a/genalivam.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abfa33af26---51743194202.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/rekibuxorupulaviv.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/76061139911.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/8969204989.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/kejegupovidetitasogowi.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/28164037354.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/kugolodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=minecraft+pocket+edition+original+apkPDF link annotation
    • https://mediacentre.aerlingus.com/js/ckfinder/userfiles/files/29265661650.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6F 21532 bytes
SHA-256: 49ec64ecc46920b27b371816467a45ea0c5eecf3677588da1a9bd4ca8dbc0918
font_01_sfnt_off000114c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDF 10712 bytes
SHA-256: 54ee6125e4351215d77e4e72bdb6661a9ac85ec44a783909ed2b862dff378c22