Malicious PDF — malware analysis report

Static analysis result for SHA-256 730848ef72ab4933…

MALICIOUS

PDF

85.8 KB Created: 2021-09-18 21:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 43d674c9268f77e7c2210f28e343b2ab SHA-1: b2ef21deff9d05f33e5a8e14c61cdd3ef2dfaee3 SHA-256: 730848ef72ab49337a766b1a3beb1622a2ec388ff3cb5ea854b51ccaadcf166b
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 or disposable hosting domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/nozimepazoves.pdf In PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/wusesulupikigixezibod.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/finebadegemetujon.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/fubuvepirifoxusagog.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/venaxozonanimajadawuv.pdfIn PDF document text
    • https://serihosting.com/calisma2/files/uploads/gokidujijepajusut.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce0f494238---51498491621.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133c4904f3cc---80154229401.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/3fb2cb849ddf0cfd0b70fa0097dbaa12/baduxonodilobixufopakozaz.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/81104026776.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/jiwakasawufata.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/xuvobisosi.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/jowiniguvoru.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/danesowulas.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/91166648573.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/girefivimi.pdfIn PDF document text
    • https://digicpictures.com/downloads/mijolaxa.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/71664289682.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/86161837442.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/27395224667.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/opep1ciam0qljhll8otvdk8n6d/48177938391.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9d00ea2527e0f6a048658fe24dd69905/78076305692.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=mbbs+4th+year+books+pdfPDF 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_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 18224 bytes
SHA-256: 3c53cd53b7b2f95ce1eeecafba81c47dd91b709281d5234a9a63f22e8dce747b
font_01_sfnt_off000118cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E6 10768 bytes
SHA-256: ede951ab4ad0e75ecc5be7c656a6ee406b367dc2df0eb060a54bedf93b623bf5

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