Malicious PDF — malware analysis report

Static analysis result for SHA-256 41210fb8b4a97dfc…

MALICIOUS

PDF

84.5 KB Created: 2021-08-13 03:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 342b271ee7bde13a20ec116b05acafb0 SHA-1: 05657b4993ee0430a3be5cd0b45791aa1ff5292f SHA-256: 41210fb8b4a97dfcc5865bef0fc9472d37f9c4ec0eaa01a95e61bffca9866423
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a phishing lure. It presents itself as a payment redirection or MFA verification request, aiming to harvest user credentials or session tokens. The document contains numerous links to potentially compromised websites, suggesting it is part of a broader phishing campaign designed to redirect users to malicious sites for credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://blessingsngo.in/userfiles/files/guzubogulekejemuk.pdf In PDF document text
    • http://dsagco.com/Upload/file/94063540032.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/kisajoravisixijukutolavi.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/woxesagemezu.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/ee43phkh46327thjpoigrsr223/33663525638.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/8050030913.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609031bc787e6---bakixugebepuxizoli.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/86258008763.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/35101638122.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/vimudotujozopegafelofigeg.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5c742b4794dd4be386f366ef9c23b7b2/41621624789.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/81iiimmohu60v6pd17phppiqms/difogufemozopad.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/b01mjitvp1h1e6j8ua2vkclebh/63437052178.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/hhd7skb6ab2rrnjkfmgsj7osv4/5179388602.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d5e13752683---30119959534.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/3k80d0egqh4b210asjiqhd1hi7/zulovovubilaporexurag.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/pamodav.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/tewuzoguvajonevakoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=symantec+vip+access+transfer+to+new+phonePDF 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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6D 11040 bytes
SHA-256: 1d020352d878a6fb3f6496d85e82ab474c088a6939b7c4e2b993791108cc1ea8
font_02_sfnt_off00011601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11601 17832 bytes
SHA-256: 80c8690b9178ee112e1d27d799dabfa34e0a38447e4f147c443cfaba69af73d8

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