Malicious PDF — malware analysis report

Static analysis result for SHA-256 2903b08d0c0f4c8d…

MALICIOUS

PDF

72.1 KB Created: 2021-10-03 08:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 31967eeeadb19d0c6737752b4558ef89 SHA-1: 902f8904b4152278c4158dff6e5384d8d4589e1e SHA-256: 2903b08d0c0f4c8d2f67627e9cd18fff79f6ff005eb855e5aa2e9132acabdc3c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded JavaScript likely facilitates the execution of malicious code or redirection to further malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=instagram+captions+on+dogs PDF link annotation
    • http://dianacb.cz/userfiles/file/folatipiwuzawani.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/kumibadesijavukerax.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/18302002384.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/29230853773.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ba5de4481---vonoxivilexepugusisomawo.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/74412143855.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ffa093ad6---nomafevubaledudemi.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4cc44f8d2---degila.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/nemopolilesojuwebawijibo.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/89418912479.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/dalutiw.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/kenuxofevaxorumibol.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/8024013715.pdfIn PDF document text
    • http://njboyuanchem.com/upload/files/tusepika.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/xidigafaxelizofikeguzaxo.pdfIn PDF document text
    • http://kmimmigrationlaw.com/userfiles/file/54285371064.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613205af00b95---munumozupo.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/65812493731.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/39317771949.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/rudenu.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/pakurivi.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/55260005726.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/82131245989.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/65498266998.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210909221826.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109140617167290.pdfIn PDF document text
    • 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_off0000b53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53E 10628 bytes
SHA-256: d3c7e35477b40fe44c4cb4e5c4b5288c718f922fc52279985faed35ee70d93a7
font_01_sfnt_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 17972 bytes
SHA-256: 104d7ec43910199cf3ca0711addb9edfa9c00e29e76c1a68df4c23c88892b7d7

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