Malicious PDF — malware analysis report

Static analysis result for SHA-256 230f3567bffbe241…

MALICIOUS

PDF

83.6 KB Created: 2021-06-26 05:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f6cd6b6f3372752e9fcf268a32365ac3 SHA-1: 146a911f8897cdb524ca7e53eafbc3f1194d5387 SHA-256: 230f3567bffbe241feda77797c948ed7e31aa27353a1b2fe9df2b6fbe3c84ccb
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 WordPress sites. These URLs are likely intended to lure users to malicious content or further stages of an attack. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad6434f116---bojexejagepojixona.pdf In PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/fdcd5be22c5dca5240373a86016a8790/1536809694.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad11c94bae---pupakipebejeseniki.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/9b4124b14faa58b0c91d8a727f46dbc4/batogomometoperesekuxiti.pdfIn PDF document text
    • http://stevis.cz/files/file/rifawarivad.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/zitowifejalib.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff070c0fad---73376723344.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c8d1c3d76---nubotodujaras.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/34019688740.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/142113016827.pdfIn PDF document text
    • https://longhoang.vn/upload/files/xomiwadosajumozoroki.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075b175b055c---xetifonumakesotezobunu.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/0cfipkc0cqt6sm4bpvfuuok7if/vawadoxejefeseduvazo.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4384409d---23232801220.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/nesazepekufowizega.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160783e652160a---tazotul.pdfIn PDF document text
    • https://agatanorek.com/files/file/lazerizir.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a37ff5211a6---40812386577.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/n3h7tne7nsogumnrmq6vocoar1/pesovafuwikurorisuzaleniw.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b5967fb3b---xibafakanenejunawis.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/0ff576904af6b1e904c01539a3cbf9f3/suwitimoxadisuridolobefus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=bmp+to+pdf+convertorPDF 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_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9D 10432 bytes
SHA-256: f371834b6881a3d4b6bf9685e9a39036ae59e7b48fb97b4ba7390075755d5e47
font_02_sfnt_off00011542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 17012 bytes
SHA-256: 76086dbf4c2e342bd6695737cf4e4a3efa8f0899ad94a68aafeb7b3804cec7f5

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