Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0f01ce0fd50d2d…

MALICIOUS

PDF

86.7 KB Created: 2021-08-06 22:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1d791929a7a15991b23d2836aa735ad8 SHA-1: 883b495cd93c3b76a0da30849261bc20b2ebfd82 SHA-256: be0f01ce0fd50d2db4f8c06d8df68a7d7e2da0297749c1bf7db0c1fe5ce69743
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs hosted on disposable or compromised domains, suggesting an attempt to direct users to malicious content. The presence of multiple external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mclarenquartz.in/ci/userfiles/files/84510541118.pdf In PDF document text
    • http://saltokisport.com/uploads/files/gaxixidexulukamejiwubifal.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2f2c99698---21310612848.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7612924931.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/98968487965.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/wiwaviteluwi.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/e35ca426e85ea2980b3374fa8a3df07a/83302725077.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/95841161390.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/51632690338.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/odtr89ns88l701hs804dia9u65/nuzalela.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c24d47bc5---12948381098.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/85312436243.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/peluxosixaxunorinubo.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/wumefoseke.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/12666244403.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c40b04997d2---35130801316.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/sofodepisokozozivev.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a62d49131---fuwakar.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609199670d223---4058365641.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/wonara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+address+do+i+use+for+chase+bank+wire+transferPDF 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_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 16960 bytes
SHA-256: 5fc66e9d837cda6f1b45dc7c28c7ada07411e3939453e2a689dca3ad1aceea51
font_01_sfnt_off00011ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D8 10936 bytes
SHA-256: 7312dcd5e90b925954dc402df785684952fef1017336429a1f13e9483710ad76