Malicious PDF — malware analysis report

Static analysis result for SHA-256 817ae548c7e345f9…

MALICIOUS

PDF

78.3 KB Created: 2021-09-17 21:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 36705d6dbdafe2227b8b30b6dfa2a33e SHA-1: 4990a5098b8303d10610929fc0b19fcd81288c2b SHA-256: 817ae548c7e345f9732a447f3f7c50e45762abfc21620e3b17fbeb2cfeec4939
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a link farm and embedded URLs, some pointing to compromised CMS upload locations, suggesting it's part of a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic specifically identifies the document's intent to trick users into calling a phone number under the guise of billing or security issues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://haidangpc.com/contents/files/37661204205.pdf In PDF document text
    • http://www.klimavill.com/data/editorfile/felipawudejibuzowaz.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/renepomirekox.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0405672001631439935.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613327573f34d---xarigalu.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/72514573300.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161383d453d618---76680197139.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613da426628a6---83010534557.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/48802557508.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161390943eaa46---fupikafejevagabofimazixaw.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/nujivunilivoke.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/6647930228.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/wijitujo.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///novoxa.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/woxajasixinetogutuji.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/dovulut.pdfIn PDF document text
    • http://elpijisystem.com/file/76597673773.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/e5b727cfc4c869ff18e39ffd30b850f6/18041882564.pdfIn PDF document text
    • https://egf.tw/test2/images/file/vevofujolubiver.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/pafafuruzigima.pdfIn PDF document text
    • http://espwireless.net/uploads/file/nikabazubexinenaduduzewa.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/nefuliwiwisizetas.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/figejiwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=instagram+reels+video+download+by+linkPDF 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_off0000cc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 17816 bytes
SHA-256: 16a348ccd44b5793c0dded9613858b7b25ae347223851f3c5e95594f2931f4d8
font_02_sfnt_off00011265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 11040 bytes
SHA-256: 238f88b6a4ee8b7186012ade6e8bf1fa38d41a714e27bc6407a3247bcc9d5501

Open this report in the interactive analyzer, or submit your own file for analysis.