Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df9295f6b2b6184…

MALICIOUS

PDF

86.4 KB Created: 2021-08-21 21:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: be0a849494d1ce69573994927b23c9c4 SHA-1: d703a1bc06b15a89dd8392365e46258a1300bf2a SHA-256: 6df9295f6b2b6184896e3366d694c0c1249f22b16874070c802ef3791aafc5ae
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://catamma.ru/uplcv?utm_term=yeralti+canavari+1+turkce+dublaj+izle PDF link annotation
    • https://printsolutions.ro/uploads/wysiwyg/files/54460253517.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/kejilipov.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d96bb4159ecefe0dfad1aa2092086ae2/51686673091.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/zenekoraguregadexagabop.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1609b626615d7a---munebal.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/61592133552.pdfIn PDF document text
    • http://www.serenissimaservizi.com//files/sepexuli.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/18817066626.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/45a1d82eb65e0d01e6ff8c86ef6d176a/63627696411.pdfIn PDF document text
    • http://ihdbd.org/upload/files/65675422388.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/93441332522.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/wukamagevaxekipejif.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/kebirepuzenimam.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076bf3cb60e1---lijufipinomuw.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/83770ad11d68eef729005e84bbb09b46/vugokixakuluxapinojusuwal.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/29aeca7bb39aed1748a0e9b1da8823c7/98148335428.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/5d7nln5oveobrmh930l7n7lfqc/38618502358.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/usrpnmo8cqa2n3hjifq9jiqu0c/kopelivafesufoxuta.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/totib.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/82275289074.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/33992477385.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44773536386.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

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_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 22172 bytes
SHA-256: 6ecaf3d78d0e1bc15c87c917a7c86ad6a23927a297de57a29103f3409550de1a
font_02_sfnt_off000130a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A0 10696 bytes
SHA-256: 1d0d08ee0dffae74fa78459de041ad03c86ed70c85ad1123df9f0e3df6f50d94

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