Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18dae1e291e99dc…

MALICIOUS

PDF

81.6 KB Created: 2021-09-20 02:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 445c624e5b210ca4e6285db61a7ddc8c SHA-1: deb31d113c524f04c1186b381ce17246b226eca2 SHA-256: e18dae1e291e99dc87bfa67ad9e2c0d6bfb8580c610eb2382277a4ab73d98d29
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phone-number stuffing scam, with numerous phone numbers embedded within its content. The document also contains a large number of external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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://uptownchantilly.com/uploads/files/45857209277.pdf In PDF document text
    • http://vitalchurchesinstitute.com/files/file/gonuxelikomakiwudodovubor.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a66b54fe8---74101629980.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/fgv9boqdgth0uccpu6pdd04jj4/renitepilafoz.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/vefomopalim.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/27384600886.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161442ba57ffb0---larizijipepitenigebatag.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/geximitipon.pdfIn PDF document text
    • https://akconta.com/uploads/files/61532173927.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202109110317442454.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/343c08dccf3ddad10a4550c1b84d4669/dapabilifiri.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/22173789835.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/nogapumisiduvuvukugone.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/69764523526.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fatajejadobinikevoz.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/97249778549.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/20845122542.pdfIn PDF document text
    • http://runwellconsulting.eu/file/file/16627843180.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/75760024422.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/46084573707.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/suwomo.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/32557250750.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/r7q06k3u05jjmn2ge3dk9e11u3/71615753769.pdfIn PDF document text
    • https://synerhu.ru/uplcv?utm_term=how+do+i+move+music+to+my+sd+cardPDF link annotation
    • https://b2cdemo.tickets.com/content/files/majaderotumude.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 extracted file (font_00_sfnt_off0000dae3.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000dae3.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 17248 bytes
SHA-256: ec20384c617cfaa5e9477679157ba0f42280e93ce83f8406c799753f5f00a86e
font_02_sfnt_off00011fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB7 10736 bytes
SHA-256: 41d18054a7131613468cb37ce419e5304d2848a6a57ad199c64c723e47e8fb6c

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