Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eefb85bd0d118a2…

MALICIOUS

PDF

86.4 KB Created: 2021-06-29 21:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8728d7f9344e4a3e4506bb8d11c5176f SHA-1: ffd4ff36c58b8babbf07d2a9a3049370b6830535 SHA-256: 5eefb85bd0d118a2c9cae95da227eb3183a8b09e2f354c37c2a3810656b5718a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised WordPress installations. This behavior is characteristic of a link farm used to distribute phishing content or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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.
  • 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://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/8d7bad26344f3a71cab2fd3ed41d6abb/26787146623.pdf In PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a3454bef1---dolowudag.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160709907a08c4---1655708722.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/jopafidukovar.pdfIn PDF document text
    • https://activepymes.com/pub/file/tekomodifiz.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/5a337247bc6a1347ee29f510558e5d06/14429286814.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/xefotuledimugileveji.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608238564575f---13446788146.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/90307259975.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608568f164142---lukimivirulexusepanujive.pdfIn PDF document text
    • https://airshow-bg.com/file/34519616084.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/dukub.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/fjm6r3cr65jtsanangv8rovhbt/wewab.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/e7435adfcf288178e5d1e29171c5fee9/10509288483.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c760e8bd42---sixikaxaburererasu.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/jikabujigomisikevilolipo.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/zuxalalafebejaruxezezu.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/naxawozikujuwapis.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872d6b09f8f---74710537789.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/g73d6hlsjbl8bt43td3p8rr2is/bavilitibibulojufud.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/8dt6jqnc0850rcfadhrdi55dpq/24543304835.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/tikaxavokojigikuvetop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=good+afternoon+wishesPDF 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_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 17012 bytes
SHA-256: 87e3e6edcbe3746baf32457ed6a76b3ff0fff84b877e8d13d9cf6c2ebe0f7846
font_01_sfnt_off00011ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D0 10528 bytes
SHA-256: 9721b1caea243db0395ab47a80e36b4dd36cbfc0be93ef239c08681beaa81940

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