Malicious PDF — malware analysis report

Static analysis result for SHA-256 020d952d34932bb2…

MALICIOUS

PDF

76.7 KB Created: 2021-09-20 10:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b88e4e0fa55b05692d860f27063dda06 SHA-1: 3a48d0537373ef12782889c6d610d450ad012f45 SHA-256: 020d952d34932bb227817d83821e3f6f742491c80c6d7a6ef486c7e8077dcecf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://crewmak.ru/uplcv?utm_term=how+to+make+a+video+as+a+live+wallpaper PDF link annotation
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/joxajazulevilogesefadivux.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/visuzekotuxuwen.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/78406667207.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/42781093051.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/40098069223.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/gijenezewulo.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/60198034243.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/lonezuvaduniwivut.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/semizinikexovuvitaw.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/12108644938.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/nakow.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612eec73bd9e1---taminubukewama.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614720ef00272---bunumafuwibilowilasaki.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/66690622691.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/59902093148.pdfIn PDF document text
    • http://sinostandards.net/upload/files/33605607970.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/debiwabi.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/68780166993.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612faa4b3a43a---naretituwizulezus.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/fupitulumitofozuzu.pdfIn PDF document text
    • http://panteres.com/files/files/pedofonodubabaki.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/85211381171.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/fireliromumemukesekoxi.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/fosefofavinom.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_off0000c486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC486 10684 bytes
SHA-256: 39c86161b84deb292ce2f3a6827215ce4d65f2b7203e12f53f638097fe5b4a59
font_01_sfnt_off0000dd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 18340 bytes
SHA-256: aa5e14ace6112261bae780e2643020c7e327d05fe12817b5af940a2939577e1f
font_02_sfnt_off00010cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1