Malicious PDF — malware analysis report

Static analysis result for SHA-256 609a2fe2a288e5fe…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 09:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 39bb568d11e20e598dc26d2fd476e334 SHA-1: 03ab62928cc6409ec95b840574f645278b0b1327 SHA-256: 609a2fe2a288e5fe9d02b1b6926704e4ac034263c9eea70b2584950c24f26a63
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links, some pointing to compromised WordPress upload storage, suggesting an attempt to host and distribute malicious files. The presence of a visual download button further supports a lure-based attack pattern. The ML classifier strongly indicated maliciousness, and the overall structure points to a downloader or dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://quiltingacademy.info/fckeditor/userfiles/file/zimifoxomomuzir.pdf In PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161346c89afb95---vetefoked.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/70278424427.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/lazuvibuxuwirenax.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/pipokatijamug.pdfIn PDF document text
    • https://airbays.com/userfiles/file/valesejome.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/poxofimiw.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210916123247.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/bbe7a60321ce58270aadadb9d6a9c0ef/13047470748.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/rifizif.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/d804f2841a9c9d4b82dfe132dc8b554a/tiloresexekukepugeteberu.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/18142584460.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137993d4ed1d---86753651428.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/7478526641.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/lapuses.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/nojesur.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/wekama.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/nitotimidipolikabekeku.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210914_024558.pdfIn PDF document text
    • http://cke.hk/userfiles/letesorirom.pdfIn PDF document text
    • http://djpress.pl/Image/files/zizilexotukekutemisiron.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/wulalupotonafuwomovap.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/13ursljhv80km9r6akaduu3et4/79917741144.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/58912684147.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/pamote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=t+pain+autotune+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_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 18284 bytes
SHA-256: 9ad675f225c2353b7ddc33ac9a3e1d2217e8bef24646bb359ccbbe3b849a5044
font_01_sfnt_off0001105f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105F 10088 bytes
SHA-256: b884b4b12a4519b7cbe5fd739d891c25854bfcda2f6b193e0ede959e50fdb88d
font_02_sfnt_off000126fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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