Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02abe2422cc863c…

MALICIOUS

PDF

73.0 KB Created: 2021-09-08 01:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 131870f635a6b7429fcd39bea12fee2c SHA-1: 3f44ed379a5f16880473d6aa469203fd152f0482 SHA-256: e02abe2422cc863c5788a1ba21a1ab751d5ce441c9335ca81ae4c881eb5acf2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/gg63i43molju4loq2lrv1ltmf1/rupitegufivoxibanorunep.pdf In PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/59606993504.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/ae9a0646e42d4b09c0098972f5bd6bab/60802263382.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/39865101001.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/34406615195.pdfIn PDF document text
    • http://hkalc.com/userfiles/96315834136.pdfIn PDF document text
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/titusadijefozeluzutitim.pdfIn PDF document text
    • http://dietmoitangoc68.com/upload/files/77988878456.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4528540cb0---fowojawagidurede.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a982611de---17447040597.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a2993a542---pajokugipewe.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/16822753258.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7bc4e6a45---8284791570.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/baa369e2d94934858b437715f9840f5a/savimimin.pdfIn PDF document text
    • http://schokofontaenen.de/idata/rofemitibujume.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/4t6ph8q7d069k2ah8ef557q0t7/9096195273.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/89189647188.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rs44iabaed15pe7r6e3r0cpma0/62468153510.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/43527583716.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/nonapumotemulesizovapu.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b61bf35da02---59748890701.pdfIn PDF document text
    • https://rcot.org/userfiles/file/mikafusukuxegalox.pdfIn PDF document text
    • http://www.polni.si/Images/files/zadomufinej.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/tetibotalejegapatuzon.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4b6607034---nosuxefemanosilal.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/wibirudabonarewufupapob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=stability+test+of+power+transformer+pdfPDF 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_off0000b839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB839 11072 bytes
SHA-256: 9c79ab4c7923ed137b685b51ef6d1487884c3f9179504046c28e6b9385b5d2cf
font_01_sfnt_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 16900 bytes
SHA-256: 21794c4a6d13050998a082522b3a8f2d95adf74fd1fb2c75a3b1cd4541ff0855