Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eaa501ec9c38552…

MALICIOUS

PDF

81.8 KB Created: 2021-06-28 12:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: ebfc892317e894a852c916f9a12fb1c8 SHA-1: df5210a10e47536dfa27ef7ab435b9370ab411ad SHA-256: 8eaa501ec9c38552455f119207509bc3fd818ab733cc416acbe9cc9db2d6a34f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV and ML classifiers identified the file as malicious, specifically a phishing trojan. While no scripts were extracted, the structure and URL patterns suggest an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://asdgolfclubtoscana.com/writable/public/userfiles/file/kelofafejewes.pdf In PDF document text
    • http://airelimpio.mx/img/editor/file/28578636613.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/webekujolowutolanokoxa.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/nevisipuxugiromisi.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/wafimad.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ba9b06e3e---3450611513.pdfIn PDF document text
    • https://chpcentre.com/files/file/tupuzo.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/ebfe848e690ce531d364a9bce479a5f0/kezewab.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075c10c57732---81449819380.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/4f53c357a7e077c2eba2b1b95507755b/litipewurewiju.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/3o09kvnsj332jgok35d1am3fov/nuloxan.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/36b355a88dbda40674488dfa5b81adf6/75890938710.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfd9d44cb9---kafijeno.pdfIn PDF document text
    • https://activepymes.com/pub/file/13045089197.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/jawulifejenabasag.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/1c0e96aef3b320f33f3acd8a68fd8e6f/nolatix.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/52703033661.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02b6b29252---99088719218.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/98898422397.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/e8c481f7fb167ce9648e3046293195f9/35223080020.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/c8ed338e197cfde175469981615668a7/87903118609.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5d740108b---gutufizokimadililavuwur.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d4053cd61---44874629468.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/pogolifedujilij.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a43682eeca981eaa5c314f3d6e6ba4ef/91176256737.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/13705c14db2e5c64a380667f5c9b629b/pasolizesi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=wolcottville+indiana+real+estatePDF 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_off0000db0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0E 10420 bytes
SHA-256: 24f37e54ed38ac12f5a48868029bf4a4ecb1f150585f957e3da33a1450218c0c
font_01_sfnt_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE9 17328 bytes
SHA-256: d1313ba6038575abacaf56ed4605ebee5c16675e99625714000c18bbe1ab79c0

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