Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae32c22f47a4be5…

MALICIOUS

PDF

92.7 KB Created: 2021-07-26 13:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 849c1bd5802b1f41c1c8a054968ca0a2 SHA-1: dfbd1cc7312e4de30e09fed51639e56402394dc1 SHA-256: eae32c22f47a4be59cc078bafa4028ad174e8a7d3ca5afa6c9166d7d6e6a9eb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://aydin-elektrik.com/resimler/files/32721768341.pdf In PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/85326510641.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0d613c81---lubudolemimatipipijod.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/zazukazinonolexivivalu.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/90a2a29dff3f6b4a81c176b1febefd2f/35501298964.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7bd0478d2---13889639090.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/mijolisugexabenit.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/naxatatubaziwatiminikisir.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/85404260692.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/32lra5v00fc6t621pp0338es62/zegugenurad.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4412ec3efb---96313040190.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/41968001149.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/66663690808.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/22158001499.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/25027630480.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/jijevejuzuguwawatirorev.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/sopamekumerotevipurase.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/falowuxinesiduvorujer.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/b1253ec06c2b58d2a7b2658072996b56/nopivedalawozexodigevimib.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bd8c03a01---91348941795.pdfIn PDF document text
    • http://webbuilders.com/files/file/gedofexaveneguruv.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/b7e619de7241ca69f02548041b6135e5/5520418144.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/sepoxakifitojazoxomarixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+do+i+connect+my+logitech+k780+keyboard+to+my+macPDF 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_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2B 11452 bytes
SHA-256: d0e1b1e0acacbf9cd7ea9c30bbec6b894ab5e4d6b3f976b1aa438519e34fa2a8
font_02_sfnt_off000135db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DB 17664 bytes
SHA-256: 5a64a5d19e7f914478d2e3a73f77ef2c69065db21a239763c40c279c5b82cd3f

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