Malicious PDF — malware analysis report

Static analysis result for SHA-256 205618cb5438b146…

MALICIOUS

PDF

87.9 KB Created: 2021-07-08 12:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a0176d6998f617da8dda285a30637c4 SHA-1: 71ea3b0a9b201d43fc063396610c8196380beec3 SHA-256: 205618cb5438b1466fa45c4f91956621e34b7e0f5faf846963c6f18a2f6d5605
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting PDF files. This suggests the PDF is designed to lure users to these links, likely to download further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e0a572c7a---telelubux.pdf In PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/kebokewatikigalodi.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3ad57eea522fab3dfb2abf593fc64fc9/popavaxipezila.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/vseul1o2a67bp3fgild9io0nk4/82085362086.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/73c5f5f22d35570e34409abdf501c2c1/94757469783.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/05qv6ven1m0j7h7nbl0lclj35k/57244829006.pdfIn PDF document text
    • http://abwva.com/uploads/files/rorogosuwimobegeredon.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076b81fe87df---35658029426.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/21617239859.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/39610315002.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a9cea0e3---17638368194.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/tesumupaxexekef.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa55075a35---19789195228.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094fbdf9a064---xizufotab.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/i3fqtt8vog947n5l19okmvvhjo/somikitawenejedizudepevu.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/00ee8mg7soj3ho3trvapog5tp7/60504271455.pdfIn PDF document text
    • http://xn--22c6buakeib3ax0bzcc5b8tlc.com/userfiles/file/55182419311.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/32958202145.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/88404883531.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/vf0kjdfpj2btadjbsbtq4uoup6/1181045028.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/razafabo.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/78035141606.pdfIn PDF document text
    • https://luminex.pl/upload/file/nifuxitojowag.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/0fb6b245566cc282f396b1793d1dd0b9/rifixigu.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/17528471280.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=pomegranate+jelly+without+pectinPDF 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_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 11084 bytes
SHA-256: 8dde1603f391fb5b4fc07dea027b5f336c62b8fc2b4dfc37fc37e1783f7b0420
font_01_sfnt_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CA 17280 bytes
SHA-256: 379d18b812e3b5768eec49a743bce0cf2d4b71a0a94a89e64aba7245c57912f6