Malicious PDF — malware analysis report

Static analysis result for SHA-256 84db4fec1a5babdd…

MALICIOUS

PDF

110.4 KB Created: 2021-07-23 09:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 42c95a5744b4ccf58d55f1beaa550d0f SHA-1: a9b773b512e8f5cfa8deec07e5eccf13fd6b6481 SHA-256: 84db4fec1a5babdde335bc8db0d0f23aee254cb3e972cfae525b01db4fae3fa7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it's part of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or scam lure, likely intended to lead the user to a malicious payload or further phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f393b38d8c---fewemudekaz.pdf In PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/17j2jsdoklrjgvo5mj00tj3m3h/81860825458.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/24754712663.pdfIn PDF document text
    • http://www.asslar.de/downloads/16749418196.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e26348c90---7614427486.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/favadezuxefanasubipiwo.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/82610449594.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/d5fb565e1dd2d3eb0f82ebddbb750afd/42344123739.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/44669336662.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/26241118339.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/66751c03ebdda3938443afd7b2ea7cff/vibalatosibute.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/d4eaa8ad59a2bd57f2f39926f8c3ab3e/34153801192.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085425f9ec9f---wujubogoselige.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/54706c1f3eec6fc21a6f5295cd2966b1/26220489872.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae8158f9a8---lufipotomufu.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/jawemupa.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/dojexasoserowi.pdfIn PDF document text
    • https://emmaushuis.org/pages/60425624181.pdfIn PDF document text
    • http://netflor.pl/upload/File/nizubosulavojinut.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/pixuzumokijobopizi.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/91684738756.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/nuwozub.pdfIn PDF document text
    • http://hcviet.com/img-phuctri/files/19578270686.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/kobopinidizudorinukaveka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=oxide+red+compound+crosswordPDF 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_off00014a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7D 10684 bytes
SHA-256: 41e6f891d4b96b0d9c8f56c774d5825b968d53068f8b3c83655d316aebe456ca
font_01_sfnt_off00016300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16300 18860 bytes
SHA-256: 51b59ed803e2018902e2c467c5708871d47fe1d4cb8d070cf145d485f9e56bd2
font_02_sfnt_off00019299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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