Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1a55fa301d6d48…

MALICIOUS

PDF

81.3 KB Created: 2021-09-05 02:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d92ab0f63dccf5ffbdf17f44606f404c SHA-1: e51e148dd815585782c94da014322add768b501f SHA-256: ee1a55fa301d6d4879cb18053991b02857b87141ae4f25d1822e41ce7a993462
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick the user into calling a phone number, consistent with tech-support scams or callback phishing. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/4a73cd157c06d619be5c0c30cec183f7/medoxowadabotinar.pdf In PDF document text
    • http://alliusie.com/userfiles/file/sopep.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/mojunakeke.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/vifuzonifawimu.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/48008800895.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/80785496037.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210805231909.pdfIn PDF document text
    • http://chenruichem.com/upload/files/33025396973.pdfIn PDF document text
    • http://vipdiler.ru/files/file/pagupameraseropifabe.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/pojepujomufedaz.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9b6ahdvj6pjqqv9gh43jtjhc81/91238925268.pdfIn PDF document text
    • http://namngonviet.com/user-/files/78330787983.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098718ba8313---puwexegebag.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ffk0osameocknhb75b0k66k3l2/dukepajifo.pdfIn PDF document text
    • http://handgun.ee/media/file/22076685525.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/8725002794.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcf612880b---64724560448.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45170246970.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/lerenexi.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210810_9D30F6145844E8DA.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/razakaku.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/97600222673.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/sunube.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/21abe2473a5631b267e7238b124a1ce9/77124376740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=four+square+sales+worksheetPDF 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_off0000d8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DD 18364 bytes
SHA-256: 01d629be914eefe4828efee4b8f1601b6ecf7ce13231ba6350b0bdac6f7354eb
font_01_sfnt_off00010810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10810 10408 bytes
SHA-256: 18c2a4b678432acb08afb05e56026cbcc5e38fbf51bd78ac6cbfd6cbf102502f
font_02_sfnt_off00011fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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