Malicious PDF — malware analysis report

Static analysis result for SHA-256 222729fce033acc4…

MALICIOUS

PDF

117.9 KB Created: 2021-09-06 07:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c90612c21b5a277923d8e5b66b959c70 SHA-1: 80c332d0bda631a43dbf1d0dcec3509647c38f7e SHA-256: 222729fce033acc46c576ec41e23fbb96e042ef5164412d0ae3d76da7dc24ee1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to phishing sites or download further malware. The presence of multiple external URIs and a link farm structure strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://www.moyekolodin.com/files/12295300037.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160703eb160259---xoviruxifikufukobedazot.pdfIn PDF document text
    • https://basisangka.com/contents//files/luxetakisajufagujubu.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/0b8bc07d4f395a3b663dc2b4085ffb0a/zafodilepepisewibowe.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c6496bb20---nukebisiwal.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/89007001594.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/rowukavula.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/tuxegivuw.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e5a2e0f93---91579629799.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/mifuduwerifilazopokukaza.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/xirinikalurevaloko.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/cu9uq3sbf5m1f4c4ftihgv26m7/lalomegigufe.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf4d15ac96---51204478395.pdfIn PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/fejapewodenikowinizutum.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/4167588210.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/ravaf.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095eaedf23ab---gogoseguz.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a498e4ca0fe---golarujatapogovu.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/werab.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d4d4e4a79---dubuginitisimijegowevor.pdfIn PDF document text
    • https://t2sc.me/userfiles/25605138198.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/ximexetulaferusalatuk.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/45544716074.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/zolovazikusaxaraf.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1a4c7e1f6b4a25a9d12b36da1f6fb25a/57637263028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=historias+de+amor+para+reflexionar+pdfPDF 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_off000164bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164BC 10752 bytes
SHA-256: 5afbc82a47db234443ac6871a070900eac970ad6e585d9d80f18c4198216c235
font_01_sfnt_off00017d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D6B 20108 bytes
SHA-256: 3704667485b910404e35248391cea3ba8ac7cee0d67bcb02e2f6be6583b8719e
font_02_sfnt_off0001b0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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