Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c266c623becef1…

MALICIOUS

PDF

121.5 KB Created: 2021-09-01 16:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b0591b5c054f29b6142c780b373b5b3f SHA-1: 4ba3f062272d41c2cc6d31c385a5443e64eb0620 SHA-256: 73c266c623becef15564c56242198be8c84cf383f080146fee769da3871a6d56
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, likely intended to defraud the recipient. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or phish for information. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/p9odbcpl8guhfka33lqs4n9ape/kaxukitide.pdf In PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25168927931.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/tozosa.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/c34a3b1e939c6430745be07f84e872d0/kaxejenugogijawojuni.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/pasepinuvo.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/roputizaxipemeras.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/45339199540.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/rowigukizalopeganeso.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/a4db7c6e46214b6d9cc0285d42e1aea6/53757594196.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16119c3cbe2f44---24156244031.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/e9c1gp1c0hktojffqkpc3enr87/tuxarutenebodoleguv.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/394438c798dbfab60f5094ff8ef78105/38588932365.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160db193ca890e---59237095555.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc301bd9c7---zekifajerok.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/2c03d98de1fa3bea3f8751e046306538/furovubafusubejugode.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a59a45dd13---xozebazeromo.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/54436379005.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc86f0bed88---83658006595.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb105e3ac---31357999187.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb630cc858---47458970503.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/dakejibuzusoxugag.pdfIn PDF document text
    • http://ort168.com/upload//ckeditor/files/xorevir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=second+fastest+belmont+stakes+timePDF 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_off00017057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17057 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18869 20416 bytes
SHA-256: 31529f9fe5f85857ee25ec82c99ca57b6cfc7b70539c34d3c133bb7101fcef0c
font_02_sfnt_off0001be10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE10 10844 bytes
SHA-256: 0b0bd44ecae1b72ab5e115d29291f867f1f5d236c989d3255ec45353aa9ac5be

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