Malicious PDF — malware analysis report

Static analysis result for SHA-256 aededb3c6fd39190…

MALICIOUS

PDF

74.0 KB Created: 2021-08-30 01:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7a9da86ee3789d2882b05819845159a3 SHA-1: ec4b6738839a52282a4b28dd19c13994019a1b96 SHA-256: aededb3c6fd3919065be0f6618aff1a134dd170bb235822c197fcd685c472939
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ML classifiers and ClamAV, with a critical detection of 'Pdf.Phishing.Trojan'. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, several of which appear to be compromised WordPress sites. These links likely serve as a lure to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://mongolia-volkslift.com/uploads/files/4194889984.pdf In PDF document text
    • http://aloeverajuice.cz/files/file/90616647547.pdfIn PDF document text
    • http://technocom.pl/editor/file/18665515701.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c021e40309---30436411701.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612a14356687f---5003780911.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/85186501176.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806fd408efa---tefomomitubunisele.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/70717690922.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82a8a90a4---dowavologatakeseguxij.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/gikuxerilode.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/74214103058.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/73506132829.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2607d381d---52073582228.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/62226412359.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/tifijirilukigo.pdfIn PDF document text
    • https://areicon.com/images/file/tawadozaloderikefawuna.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608078b757e9b---64897520783.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/desipabubibonadure.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/16227825041.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/16998458223.pdfIn PDF document text
    • https://emmaushuis.org/pages/xivunumedewiz.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25cc05804---dovorulameruxeg.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/39445289047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=in+migration+meaningPDF 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_off0000c211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC211 10188 bytes
SHA-256: 91d361d075b1591f0ad788a10cdc3db560f6021f7c043da9affbde7557f24d47
font_01_sfnt_off0000d8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 15892 bytes
SHA-256: 8a0aa7f314fef0457cae90ffa1291cdfc4155ccbf791e1f09f1e9390776b9ebd

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