Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6f3edb01d65099…

MALICIOUS

PDF

80.8 KB Created: 2021-09-18 09:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1c9f3cf90a88ca420cc5790d91f26461 SHA-1: 84f416b4f56779275ed4b91dfdd18e55d658bae9 SHA-256: 6a6f3edb01d65099b506e467f84677189c7e030000bb4aca157187cea31743cd
134 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, many pointing to potentially disposable domains, suggests a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/65c1385c6688ea07bc624a7efeddbc03/23556959943.pdf In PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/69206948202.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/4994537890.pdfIn PDF document text
    • https://menu2uplus.com/images/file/runupikofekax.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/ludexu.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/47698991931.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/26328555385.pdfIn PDF document text
    • http://familie-schiecke.de/images/file/futexowuvilalexi.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/bogusajobisenerug.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/72799966466.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-9-7/20210907111603953786.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/wezepa.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/wamisoxepokodezesilef.pdfIn PDF document text
    • http://oris-am.com/editor_up/ratagixogarikakut.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/pulutine.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/mimepimalinenijov.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/joduxojoxejimufowopa.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/xumibetodeguzoresodasan.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/37291306051.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc9b90bcfc---50284544638.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-7/20210907090157123997.pdfIn PDF document text
    • http://taxfreepoint.com/file/neridopapinaguzu.pdfIn PDF document text
    • http://youil.org/userData/board/file/valowesusupasodovafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=new+battle+royale+games+coming+out+2021PDF 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_off0000d538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD538 11284 bytes
SHA-256: 16d928bc5cf00dd94c0f685844976e488a89e7b2f75ccc4e6998a2d0715623d0
font_01_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 17476 bytes
SHA-256: 1e5905d557510a803b498f52cd6ce27f5b12836c43ef6539aee5ad1db1760ce1
font_02_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1