Malicious PDF — malware analysis report

Static analysis result for SHA-256 6240aee4fa0168df…

MALICIOUS

PDF

79.1 KB Created: 2021-06-28 10:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bffd9d828dae46589e24dcb840b34a50 SHA-1: 62eb8aced428b2de7a902eddf676f5f46819f5dc SHA-256: 6240aee4fa0168dfacba58bbf47c495ccdfa137c3a302c8e36787b259cb5853e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on compromised or disposable domains. These links are likely intended to facilitate phishing attacks or download further malicious payloads, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://allytemp.ru/uplcv?utm_term=tangents+to+polar+curves PDF link annotation
    • http://auapp.ch/userfiles/files/maweboribezi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/tupigitabexonakuso.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0ce1becc4805c580334c4bb8fd2c72ce/76924758645.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/47450779174.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc10d5ccb2---vidimifixamobelavoxa.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160823e511c07e---wapibisimisuxavuk.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/xeluxojatuzibefob.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a59a8599c60---82297031495.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160c674dbda521---filomebume.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607954c93bad2---xepezujejikupezenez.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084f4fbae7fc---19396896107.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/26c2d70e575aefa85131694baf7df024/tijugaxibesusezan.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/a131b859a1381fdbe3240887ad700919/79011723591.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/9760ae9290c759f4fa7d0ae440d05958/13760562579.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/33164505047.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/saloxanutal.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a521edc6a16---ropekebexijijetitodalug.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/0e280e259ac1cc7fabac36531ba8df43/seroruvakupiwamanakaxojuf.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f4259437---25576344921.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/d8bf0e8a025e8f444f6ea3e875aca3a7/45560537572.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/re6mn5uj5dgei06158kjskr5b6/warofunaledatazivotum.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/94377255030.pdfIn PDF document text
    • 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_off0000d1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E9 10588 bytes
SHA-256: c1434ecbb59a7f947946cbdc97ef8313c1929ad204835d5e88f530f24958d8af
font_02_sfnt_off00010253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10253 17260 bytes
SHA-256: fb91f21f6c5a418065a0e1efd7d568bf890ec4323fe8c0e664e738101aa3fa6b

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