Malicious PDF — malware analysis report

Static analysis result for SHA-256 d301b1ee68cb90de…

MALICIOUS

PDF

72.0 KB Created: 2021-09-25 15:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9d8a2f3cb09a434d6bc38a78d8798ca SHA-1: a547aa8d8c4e39bab0b6ab35bd43950cad1376e4 SHA-256: d301b1ee68cb90de9cf70612882183b7604c77d31d2769fef06d8e72184ddf23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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 http://jplus-ag.com/upload/files/BodyFile__61374F47D6B28.pdf In PDF document text
    • http://shinhwajudan.com/userData/board/file/85785984098.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/dejesan.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/raligasenu.pdfIn PDF document text
    • https://swiz.eu/files/editor/futadawudonafidud.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138deb437833---kebubu.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426ce2d8865---mitosivuzamomile.pdfIn PDF document text
    • http://186086.com/upload/files/wixexanapitijufaxu.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/r7qkt122ptbspkv5ljbl1cprj7/linisimivasajisogodu.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/kifupe.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/zoladem.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/dewaroditiruro.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109231343421812.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/mudelivo.pdfIn PDF document text
    • https://fultoys.com/userfiles/10052169711.pdfIn PDF document text
    • https://angkagenap.com/contents/files/fizufo.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/lm9l6kh47h0cl7s7hrfhd97im0/94055780697.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb37e5c193---18582373418.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/motisidopusojovufolupeji.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/77567216423.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/90043863892.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/mopoxelixonitovavokulalis.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce516e663---mebitesonurun.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/89328781751.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/34892324962.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/19070220599.pdfIn PDF document text
    • http://quiltingacademy.net/fckeditor/userfiles/file/dowudebes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=parallel+space+apk+old+versionPDF 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_off0000b92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB92A 15772 bytes
SHA-256: 3612219045d02485cce0efa32148a9dd29c0677209a3ba746d0552a220fa037b
font_01_sfnt_off0000e198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 10568 bytes
SHA-256: 3a024504523922afa6a5d19e10c31bc8b4e7a11b20e3dea5fd25471eac68a082
font_02_sfnt_off0000f9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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