Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8acc7337880578…

MALICIOUS

PDF

78.7 KB Created: 2021-08-10 03:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6397205e3719ffbbaef82b45960203cb SHA-1: dc923d13d57aed905bc0c4fb9c718495a9a4017e SHA-256: 2e8acc7337880578b89e5cdf340d6f9e108daa18961a0ff1b2711415625ee71d
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, including compromised CMS uploads. This suggests an attempt to lure users to potentially malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://geojeoceanhotel.com/userfiles/file/20210721052755.pdf In PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/daveragabi.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/zejoluwuju.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/pajivotawutepata.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/1f1ea71e301cd1379d36292a640c0491/relogi.pdfIn PDF document text
    • http://momsystem.ru/public/file/34708354010.pdfIn PDF document text
    • http://csc0532.com/userfiles/file/20210629193604_ov54od.pdfIn PDF document text
    • http://chikatere.com/Upload/files/jafunawuvado.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/14967375143.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/17516766021.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/64612583215.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b95fe829653aae93ac85554dbd0b960d/pekasukemuzuxuvu.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/agss5ba005v25ithr7r3u5fk75/83653341426.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/relup.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094aea80bcf0---64651800445.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/87493672785.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/c27530a41a2ff2396e05a91efe1199b2/koduvalipakadoto.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/f7eaaac8ebb8ccb728ea7f32491e3923/42128529683.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16199297169707.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2495dd3863---vokisibe.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/2aa7364e06905b0253459ca85f6f88e3/zirasepokem.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/44208048398.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=10+computer+parts+and+their+functionsPDF link annotation
    • https://lapdonline.org/file/88309826312.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_off0000d0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CA 16376 bytes
SHA-256: e4482d6f003de67c2eb8c3f80540b1af8a5fa01c8979b17d4713e78d10bbee68
font_01_sfnt_off0000fab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CC 11016 bytes
SHA-256: ce78b7978041e7de278a748e667639096b445d056e9939dc7735afa37a72e9c7

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