Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9ceaec277845d7…

MALICIOUS

PDF

85.3 KB Created: 2021-06-30 17:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9aab020188b4dea551fa29f0f774f80c SHA-1: e56d3b9cd6c3268d1417166941f19837a756e106 SHA-256: 7f9ceaec277845d73ec38142dc8865ec559be30d315d74c26059ad4242bff0d2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://bean2beenefamilytree.com/clients/60578/File/xopuxonufitadelutezom.pdf
    • http://say-international.eu/userfiles/file/7063809267.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/84735317f28acf63cbb65f613118b000/fopok.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607995bdb8e75---mazodomupavosujowute.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f994b9848---marujijozovolubumakegibi.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d6bcc0b9a---jaxukinuwo.pdf
    • http://connect-senior.ch/uploades/userfiles/file/zajenuvexala.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/jfn08hs1je1m26ab4q1q6m52f0/8170617121.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffe0e4bb82---45053587573.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c91749e7b34---46206210609.pdf
    • https://cambodiadriverservice.com/userfiles/file/19231436186.pdf
    • https://cottonweb.net/userfiles/file/furogetojogu.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609075693f2d2---89809492856.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eef682f08e---22597385190.pdf
    • https://airflow-skateboards.com/upload/file/90061178023.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/505ca916fc5e57bc278bfdb61ced919e/64527507574.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/ef223f57e2401263e31212e51202fd5c/57650872780.pdf
    • http://ankaser.com/userfiles/file/lodasevakonadoremonob.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3b9cc5ca4---25225868314.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4435ee70a---73931385267.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ccf4d3729fee9adedf6af7793bd37162/85233915413.pdf
    • http://aftckwt.com/uploads/file/tususezitire.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=wish+you+happy+birthday+you+may+all+your+dreams+come+true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb80.bin
b30b42f890e8a1ffe92e2dc1b5c1f21ad060436e8a89c46217cce9bb5fa2c7f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB80 11020 bytes
font_01_sfnt_off000104f9.bin
ff417dc4e6cebb383fb508e782fe6f1f4857241b8e383866b0b08764d9016b95
pdf-font-stream PDF embedded font (sfnt) at offset 0x104F9 16476 bytes
font_02_sfnt_off00012f48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F48 16792 bytes