Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c918e2ebc8846a…

MALICIOUS

PDF

84.9 KB Created: 2021-09-12 06:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e2f949604cfc7129aac0e90dcfdc350 SHA-1: d9f27234ef5f979f8ba57bb724ae35e78c46ae8e SHA-256: 30c918e2ebc8846a8e970edad80b95db360416ac01be177fbcaf5c44be7b9c07
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristic analysis revealed that the document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised WordPress installations. The presence of numerous URLs, including 'https://pistant.ru/uplcv?utm_term=procreate+pocket+android+free', suggests an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=procreate+pocket+android+free PDF link annotation
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139b46aa0b72---45387905969.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/66608505428.pdfIn PDF document text
    • http://saaretravel.ee/images/file/78836882789.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/41623083299.pdfIn PDF document text
    • https://deepex.hu/hirek/files/tudetuso.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/mukisogevejaja.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/puzolugamivuwot.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16134bce80090f---setoralebimadox.pdfIn PDF document text
    • http://canadanur.com/resimler/files/ligotovalas.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/kuliwexobiruzewonufakid.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/xamaparixexixe.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/gopaso.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/43109022422.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357afe74fbc.pdfIn PDF document text
    • http://mobiliteit.nu/files/livazodawuwefoxexegonefir.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/94175218704.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/lilopezerofudefimiva.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/43646176709.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/16004922861.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/ranixowupum.pdfIn PDF document text
    • https://hotelcorona.ro/files/lokimopig.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2b6a8d917---juvixawimuguberami.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/99576731301.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/roxonu.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_off0000e797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 10492 bytes
SHA-256: 4227a55eba3fb6eb64ab48d258162aff0d9a8ad65da37b06236489db9f8fbc51
font_01_sfnt_off0000ff88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF88 17992 bytes
SHA-256: f334faffd46578dea065144ac444c1b69f3d760c1a9cbfeb1a535bc4a37538b7
font_02_sfnt_off00012e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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