Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bd5552dc4d8614…

MALICIOUS

PDF

84.6 KB Created: 2021-09-12 12:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ef391f62c95c71523a2804296af91456 SHA-1: 9a0c4eb5359e719d9a4075a78a7bb3b3865e90af SHA-256: 60bd5552dc4d8614b72eaecce40b1224c46cc28af8a117f2c54d4cca86e79c14
112 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which are hosted on disposable or compromised domains, suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the malicious intent. The embedded JavaScript likely facilitates the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yuanda-boiler.com/d/files/21831265665.pdf In PDF document text
    • http://contactfm.be/userfiles/files/semuranun.pdfIn PDF document text
    • http://centrons.com/uploaded/file/12659300896138d61071f19.pdfIn PDF document text
    • https://limadelimon.com/images/file/35051602677.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/sojezezopewiro.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/6e5e3620770a353696c01b1e35011990/38932995164.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/27393586708.pdfIn PDF document text
    • http://p-energo.ru/content/file/kimad.pdfIn PDF document text
    • http://portableandcool.com/files/files/poliso.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/peruni.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/wederesikipidatidib.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/bosapubipirepaki.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/domofezaso.pdfIn PDF document text
    • https://faceless.me/userfiles/files/6692680493.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/kogituxomerepemimibixo.pdfIn PDF document text
    • http://ktcz.eu/files/files/71872323423.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/38059580455.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137aa633e168---gekanavezafobesugux.pdfIn PDF document text
    • http://xaydunghoangthanh.com/img_duhoc/files/pomusiwereb.pdfIn PDF document text
    • http://elpijisystem.com/file/18885508066.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/selob.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/megaxebilogimabete.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/21625035007.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/50896946796.pdfIn PDF document text
    • https://urbanshapes.in/userfiles/file/43966379715.pdfIn PDF document text
    • https://stormester.no/files/file/junuga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=update+miui+redmi+note+10PDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388ff526a2f---disezogevomori.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_off0000e8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BA 17016 bytes
SHA-256: 6f2cfeece4c9dbd5c30ca4ebeae4c443a1179177e3907725fabe9bbafd325813
font_01_sfnt_off000114c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C3 10620 bytes
SHA-256: 189c57d4cc38ca72f8eaf9f7f8ab1118909fec3d33a09644a2fde73571c53c4f
font_02_sfnt_off00012d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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