Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e266b78cf8bec9a…

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 01:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 767d33edf7e7222b3f68c31772879165 SHA-1: 141a2ff2d53df904dc01808af5277cbb6d355515 SHA-256: 1e266b78cf8bec9a6e9e2fc3ce3a9b5069dab64bb9f1b08c5327649a00492106
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous compromised WordPress sites and disposable hosting domains. The embedded URLs, such as http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083242654521---xatojojemoziza.pdf, are likely used to distribute further malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075ead665ef3---lezibejamatotuti.pdf In PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/c0ldtl8irndch2t7vu3s38k0ko/vetepuzufeduju.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d2e92663b---63458663759.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/p5ph5qkodb51kcb2kmehr7rba7/57218585644.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f27af6ca50---tamigukaf.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160940fd921ce2---52538984040.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/64666299796.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16083242654521---xatojojemoziza.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/mewejipikoditixeduzuma.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/6618fc1c08f9c18121dc8eba2060b068/26369249804.pdfIn PDF document text
    • http://canvangdientu.com/images/file/67831269057.pdfIn PDF document text
    • http://princeverma.in/uploads/files/lulesupuxemitaki.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/ecc1ebf939f7800e7056454f90892863/49694215246.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c47414ef1cd---660757537.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/0l0eimfmrqqmokvg153q4ae2nm/ligezozutemamibepupuj.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/0429sha8qonkpem18vpsv0bpea/jeruti.pdfIn PDF document text
    • http://stylekd.ru/files/59933186580.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/55848214377.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/86im48fmh69gsn36dkh6nlolej/vopovademapojat.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab65207263c---nudaxunojapetege.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9329a8038---rivomomudogexure.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/c9efe95bb50133daf8562f416fe813ba/51026995745.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/86552214805.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/oh6op9qpaomiu48mhbrdmb2581/74299246539.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/efbf9db10300435792a068f768607600/nekiwivamixolube.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/ae1107056ae01cccdbcc80d59bdae8bf/52136643579.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fornite+mobile+on+androidPDF 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_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 18996 bytes
SHA-256: 2be6ea450cecf9ca2198a8dff9168e7336aa5181ccc033f993b95f65a6b59157
font_02_sfnt_off00013be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE7 10360 bytes
SHA-256: 3dcc53667b239561d2eae5ce7ba2f17456e4e99e0492bd4daf5518f5deee6a30

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