Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f3c1ae67c073e0…

MALICIOUS

PDF

83.4 KB Created: 2021-09-02 01:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bddb039b1746dea7a6e70c6e2b4460a5 SHA-1: e0c091e6fbc853d088dc835bd08ce6c467dac669 SHA-256: 93f3c1ae67c073e001d089238478e0cd8bc7cf9305ad4cec58baec06ea51d83a
104 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca71ed1ba---66028131808.pdf In PDF document text
    • http://atol-res.pl/uploads/file/27612717384.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/sm6jq8d3t1pbbi9j4uhspb9ic7/66507361278.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/33896456376.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/74566596238.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4ce8b245254551eb3fc6c8a529798fc0/dimiba.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///bawogunovojagiv.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/nufojurubunavevolu.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/82e1afcd580d76eeae604848c3ddb112/53948803713.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/jakukitiruxikuxogo.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098674d21e19---zosarika.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d1ace6da2---jobasudifat.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/famamidugomutovu.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/db3d04ba5f5897805795904d967151b4/wotodafajuxoro.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1eefa0e84---43855095554.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/40771718579.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/70301543868.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/tasubirovifotijob.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/57006319057.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/29352122050.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/29483335340.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/bajotaxobolefososokivez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=under+root+of+216PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 10224 bytes
SHA-256: eeeec0c5cf1aaf6f57d545c654c1ba82c3b3ca728d5009da6dd66997c21a7310
font_01_sfnt_off0000f6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F7 18720 bytes
SHA-256: 7c3c501fe96a6c39a42f5c938ce811f144ca60c3c9c1603479db3870392f8e87
font_02_sfnt_off0001270f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.