Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedf8119021e70db…

MALICIOUS

PDF

80.4 KB Created: 2021-08-16 09:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: fb863d751243e22a58c4602aa123fe4c SHA-1: d3a150437b11cf01ab714a087659261ef63cfed9 SHA-256: eedf8119021e70dbdaf0e03d3eafeb8af7fe2a9f5cf94ca1b0b400279fb7ec43
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of external URIs and link farms strongly suggests an attempt to facilitate phishing or malware distribution.

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://tea-ra.com/user_data/upload/save_image/files/lozukod.pdf In PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/9728041129.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/81b3df66721ef6e585d40d59f02bf9d5/pimepigeriruvufibaxelor.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/318fba42cf30fa0210c3fe1b1686966b/99668428614.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/3366267500.pdfIn PDF document text
    • http://dalaichau.com/files/davarenedovoroxa.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/80706281967.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a29eec19a7f---mewete.pdfIn PDF document text
    • http://lejonhund.com/upload/vivudorekiguzeboru.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5cc9e16922---52251135771.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5ucg62bj267uftiakpuiu8gpt7/87400519676.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/48163720427.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/25556694370.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/razipelosojirulakesu.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608578faf3f0e---291900516.pdfIn PDF document text
    • http://greenberetrotcmedals.org/clients/e/ee/eef2f5edcbf7b69ea683240098563b39/File/vuxidezuri.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa9cd2012f---31427606429.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/46196253670.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/50596795488.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/68152544970.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/mefakonaberu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/423efc7641d8d2ffdc9fd5a56e6aeb5a/178228066.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1fa905cf7e---pukivur.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/65572470445.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/74no1uuf6k5d21qkrr0ug7qea6/sagus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=jharkhand+death+certificate+form+download+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_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 17344 bytes
SHA-256: c8470e6a1d8b5c8328a94cef43b40a77fd5354c7f553827bc17d24176a5648df
font_01_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C4 10884 bytes
SHA-256: b6b4cb2a47670475c12b79cc225915532ad69ee61f065689729851d0fdf806e3

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