Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1bb44ae104fcaf…

MALICIOUS

PDF

77.5 KB Created: 2021-09-21 03:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d7d01c20eb4a0956442bc0594e14ce24 SHA-1: c897d3cf851d1a9dcc0ba50e00ec7cd514fc5837 SHA-256: cd1bb44ae104fcafcea7ca62ce163766c2de9830fcee9a086f6045aa823b5ce2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=jihne+mera+dil+luteya+full+movie+watch+online PDF link annotation
    • http://myucmas.com/userfiles/file/30398611661.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/65090680394.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/gimuzuwinamakefeke.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/pedaronanujoxobagibi.pdfIn PDF document text
    • http://ingore.cn/upload/files/82288730827.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/62912115806.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161328d8a4284a---96622103969.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/31841457329.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/49039098850.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147aa4695263---wemuz.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/59986185506.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149180622972---80896373280.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132cf30dec52---60151210520.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425d1f1a9ee---mofaz.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/51562859595.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/12991991930.pdfIn PDF document text
    • http://ilkjv.com/Images/Media/files/rolajufoje.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/balitodogudiko.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/fexibigobireteladu.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/27474738623.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210904004515.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148dbf48e71a---lupazapo.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/56938872043.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109041913463890.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_off0000c9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F3 17424 bytes
SHA-256: 7b289c2c63c910c47ff78818a1f48fcd8f89a69aced4bd59a817082f494ab2fe
font_01_sfnt_off0000f6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 10932 bytes
SHA-256: 09d30f350ed7eaa38d2c081a2e11fad13424c0b6c78909912548dbc271c54779
font_02_sfnt_off0001100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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