Malicious PDF — malware analysis report

Static analysis result for SHA-256 9116f45836046da9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-21 03:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a861526e2456e0459b63151bc1033d67 SHA-1: 4ef627104500968f90637bea76488d5227140100 SHA-256: 9116f45836046da947043db582e0a6b0f38d0088af76320ec42faa543e6cf344
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. It also features a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads or exploiting browser vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/1c4b16bef3370d3a41b6a22031fe5833/kiruzenogepizimug.pdf In PDF document text
    • http://muabannhagiare.net/images/uploads/files/lanutumojuxugaw.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/kafakowiloloma.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/66392409057.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/86122850807.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210914152138.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/68325761851.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/zorowujekesomurox.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/jopipanetivijexaxik.pdfIn PDF document text
    • https://premium-house.uz/images/file/93763126999.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/reraxolok.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf9a2914f0---lotidul.pdfIn PDF document text
    • https://yensaovinastar.com/media/files/tuzij.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021982227396238.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/movawixa.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145ffdbc2388---60905227014.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/60837374279.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/12330412884.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/97120553235.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/21359195104.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/14789372046.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210905_205244.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614572f33da5a---tuwarinarafotalazadobawud.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lepejigikil.pdfIn PDF document text
    • http://www.siposferenc.hu/html/nanufuwatulopom.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/turuki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=gta+iv+san+andreas+apkPDF 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_off0000dcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE 10416 bytes
SHA-256: 162ada38f923fecf60cb999f8dc33e0b9b5d2707b6d44f672a3ed14724d71422
font_01_sfnt_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBE 18368 bytes
SHA-256: ea525ec072cd63f65aebf494d5374a2d65798a73be6f8707997bbba2937d18ad

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