Malicious PDF — malware analysis report

Static analysis result for SHA-256 8392dba327ce407c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-24 20:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4318440a17cb7585dbfef888040098a6 SHA-1: a6180e935a30a3a623b3bcd6de4a8205ab17837d SHA-256: 8392dba327ce407c7208e7b1b83aef10a40809a5d4ac71d2e62363b9907d178d
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://gruppocaminiti.it/userfiles/files/21680358759.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb23c6d7b---mademuxutojapun.pdfIn PDF document text
    • http://shbaicun.com/userfiles/file/2021090207003073499.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/vidabetenogep.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/b2c2d6964a5a45a77e54df66da3736ed/97183456944.pdfIn PDF document text
    • https://12waktu.com/contents/files/47065649554.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/sazesunevorafaboz.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/70155284821.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/bofidekinudirodagokotal.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/72923786140.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/93052017449.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/38969753467.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/56341e29447d23b37b19f9de2c204581/gasuwutus.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/51588104143.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/tuwexividun.pdfIn PDF document text
    • http://aprt1day.ru/file/galilefebalowofaselupa.pdfIn PDF document text
    • http://hidropro.hu/upload/97750177611.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/29512629784.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/nuwonibozixitad.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c7bbd593547d0be92966dba8677d9aba/507186365.pdfIn PDF document text
    • http://shinhwajudan.com/userData/board/file/komebi.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/jc0bsc8v5ps96g50386rmtnbbo/biwijuxavowunitumel.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/51795601145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pocket+pc+emulator+for+androidPDF 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_off0000b290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB290 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA7 10808 bytes
SHA-256: b596f54607dbb26fd9c6eff15e97c93f00212411eea75d8a2967cc27b93c1c7a
font_02_sfnt_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 16428 bytes
SHA-256: 6ee1dc1b3c5a74162b470e8c7bb5d28683fc6ab4c9179257f320dae5c15ac270

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