Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b634cdb096d3c6b…

MALICIOUS

PDF

90.7 KB Created: 2021-07-29 20:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e92d5199cda784c507834d3e3d10312f SHA-1: 3ef2c2d2635801d7b84add63a9be8c5650b5f92f SHA-256: 0b634cdb096d3c6b0d4fb9091d5c2b2d71fc5dfd087e98b272e71eb0d655f253
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is an advance-fee scam lure, presenting language related to lotteries, prizes, and parcel delivery requirements. The document also contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://d-a-s.cn/userfiles/file/piwejadasururakaxikopatiz.pdf In PDF document text
    • http://mdsalon.ru/img/lib/file/pavadixadobek.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/66953087581.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/f1b22f358378f40f1eeda5db11202b36/kubusemapitupalev.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/fotoguzovo.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/08803581c0938d06f2d8df5aceaf6493/75280164781.pdfIn PDF document text
    • http://merwepizza.com/upload/file/nubedoxapozumuxila.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/56880956011.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65fb1ee390---fidivaxunudamolev.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/g96i99pq4fnnfin4ievi0qf505/xiginomagufozuwu.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4a8681eeb---toburebabigajuxi.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/17647033096.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f7ba268cb9e26acb025fcacf52e5bd57/53473857716.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/9ba8f7ca638b00af9d2a3c8f9549a2c4/54027369248.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/25cfa52312a79c2efb11e91d21a13ad0/takevadepuxomesujapib.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/nofoladakezurire.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609de24db5852---41433209354.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070064ede321---40942663188.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/rukageses.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/24648199707.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/zumarixakemon.pdfIn PDF document text
    • http://z500.si/files/puledabizojafos.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5e0e8fe1e5eed84824f6b9c3577f5438/xobetimakadikobebewa.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8f27a273b---terop.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/zosopisusuvifosuxuvawe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=super+contraption+mod+apk+unlockedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011070.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11070 18768 bytes
SHA-256: 1d18d14287dea70070b28fa0ab50084801863e92e56af13108e564c4c0f5f87f
font_00_sfnt_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 10772 bytes
SHA-256: 1b577d7e056998ae36ffbde8fe7a40e115b5c136db79402f892bac6a895b4004
font_03_sfnt_off00012ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE0 17392 bytes
SHA-256: 80f85c8fcdeb22027dd6bfffd5a27cb390fd089bee63c3b12bd55f445e3f1adf

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