Malicious PDF — malware analysis report

Static analysis result for SHA-256 950e202b6b4dcd9b…

MALICIOUS

PDF

78.1 KB Created: 2021-09-02 03:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 630eb0634cca2c4ab99bfa8e94e570d2 SHA-1: aeedf188e531d0fc66229fa390f1146ee78b0c2b SHA-256: 950e202b6b4dcd9be0f941e86e650dcd3945908ed5146056eacc8d8f38e3984f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI links and link farm indicators points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e053617514---83474523287.pdf In PDF document text
    • http://annabarons.lv/files/files/jumuxakafiv.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b268515ba---jigop.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/jagodanibanikiwinudavi.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-1/20210501033527895885.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e9443c7eef---42847910970.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210518010615136.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/90004919220.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/619cc6096477fe5def39c22491267cb5/47099102243.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/xenegekabozarowasu.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/29574007667.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16075b2f2750cb---30269108590.pdfIn PDF document text
    • http://bjallstar.com/upload/file/47050554667.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/c525388e58ae120c6772b40658b45790/28358643672.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/wawaloxinowewu.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/gifod.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c99f77a491f---lufisegepofutex.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9fe45d116---junedulokavuxosowo.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/7cb8af4b47225ce225338d4d5a694245/19537382777.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/xoxuwizatukumuzokubik.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/noximanet.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/67815644258.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/zotapude.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/lsjcftuan9kem4jt60v822jof0/33425631067.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/28302681661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=whirlpool+duet+steam+washer+manualPDF 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_off0000c893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC893 17700 bytes
SHA-256: 31c8296df0318b4f63a76bc572eec3ccda0aafa07c84923c61703dc2cd1e1b5c
font_01_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF7 10836 bytes
SHA-256: 3ee7109716367493f3044c90ffee61f9ee3064dce1b0c5d3e3a8a532866570fd

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