Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bf9804e50ce0e5…

MALICIOUS

PDF

77.7 KB Created: 2021-09-20 03:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e778858a8d858bffba6e184cff39502b SHA-1: b28cb1f6c8715dad8e985f00a44c4854b3642906 SHA-256: 46bf9804e50ce0e5f48dd2f0409fd14ae65def040986e16622b04fd544f70788
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or phish for credentials. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to malicious content, potentially disguised as a download link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139c50616bb8---61108922772.pdf In PDF document text
    • http://scard.vn/app/webroot/uploads/files/wevekonidotoz.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/84225069229.pdfIn PDF document text
    • http://www.puhito.hu/uploads/zideta.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/rozitaxagaxofisasuze.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210920_AD88888208DC10AB.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/96296012365.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/menubozilusibotines.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/91306115089.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161384f7b2f8b1---43540423501.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210905212506_1u7o5a.pdfIn PDF document text
    • http://friulanapanini.com/images/file/65128395405.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b820e91283ca969504bd7451a1189b0/zopavekabazaziwul.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613518eb62c3e---lubonago.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/wewubijonetiva.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161417dd319dbc---57297373635.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/nevararip.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/sokekuramizunotixunesap.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/12537400593.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/45244440495.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/7484815564.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f615a10538---58471452088.pdfIn PDF document text
    • https://ancoraeducacion.com/images/94891595252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=crazy+racing+car+2+mod+apkPDF 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_off0000ce1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1D 10828 bytes
SHA-256: 28b5db10f35e537f1831ff90f2852af27dc608e45675fd4d4f059fea21ce1a7c
font_01_sfnt_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 16540 bytes
SHA-256: 6770bfce519c7927ad68abe43fccffa54c31c3ab686822ddba60dec1357a86eb
font_02_sfnt_off000111b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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