Malicious PDF — malware analysis report

Static analysis result for SHA-256 de57ee47ad297be3…

MALICIOUS

PDF

74.1 KB Created: 2021-09-05 07:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f9f4e04d42b8c25fbc42028678b7b6f SHA-1: c39004422246b4b2b65e20986b3fd5f3066f58db SHA-256: de57ee47ad297be3116c5c5581ef1438c19caae740d8460cc2c6e93496fcdc86
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2bf75c4f68---34143739356.pdf In PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611529b284645---nodifededukewojus.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/68064116491.pdfIn PDF document text
    • https://windsbs.biz/files/file/fasidudavodota.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46937826a8---vaxegokedugedo.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161051eeb4eeca---71750009056.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/6de820e930e3587cc4ac9f08ab34ec67/28879059480.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///59361495355.pdfIn PDF document text
    • https://kartplast.com/resimler/files/96623064708.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/legaxemutanixunor.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/59c15dd8914587104842ce6d5268f391/86901761216.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/277dc159e5b1a4359f37f4c1f324cf9b/51112290324.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079bc6f1e738---74539648687.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/c9aofnofql87ltaio0hadrds6d/riwedope.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/mukuget.pdfIn PDF document text
    • http://forspeed.cz/ckfinder/userfiles/files/bagikeraxigivofo.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/19620255870.pdfIn PDF document text
    • http://atomleasing.ru/media/File/sosepupipatebukorupe.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/ce89c01f7ea4fbf22e530d216eac8d31/1434120537.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a317518ac3a---wonemom.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210827133059.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/7b06d25314de6b01d84061c886210cea/71227681489.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gobuvofutukunawatajet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=near+doubles+worksheet+ks1PDF 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_off0000c014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC014 10596 bytes
SHA-256: 10cdc55d680940ff951d8ca821d6d118dd1c875e95fb26db8ec4b6a208ddf16a
font_01_sfnt_off0000d88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88B 16588 bytes
SHA-256: 52a1871b13de2c9070bcc807fd49bfa7c120548db01356c699f0da314a73aa5b
font_02_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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