Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfa3123dc38ee6e…

MALICIOUS

PDF

82.3 KB Created: 2021-09-01 00:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bff4bb11cf1b41b9d21148777c31c51c SHA-1: 16dea5a366385c4725e6eb04bda4e26cb90e7d8a SHA-256: 5cfa3123dc38ee6e6af075e0cd8a78d1f796fa1bd2c19df7978c0f571d9b09a6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://greenlandpark.com/uploads/files/nafaseketokevufojokixebem.pdf In PDF document text
    • https://ibeguiristain.com/userfiles/files/45554753796.pdfIn PDF document text
    • http://glttek.com/userfiles/file/95143442740.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/zufevifigilovifizomuki.pdfIn PDF document text
    • http://jaht.com/userfiles/file/48555235061.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/abc3d1ddbdda85010fec0dc441f1ed3b/dalusaruxalafatovisajawo.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/86313235725.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/26659941011.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fbc74a919---jizupilegusosuviluben.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a992bdc215---mojovazaf.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/goluwumorifuxovileb.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/eaa0220d8ed837076fb28df400225214/tululebaroduvuxokirifet.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160997cb4cd472---zebixupevusazibu.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/lujuzorabiwa.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa11bb1aaef---65076194923.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/45108820465.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5ed28c72b---9978245027.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/95519202524.pdfIn PDF document text
    • http://ozgu-yapi.com/firma/files/nalonuge.pdfIn PDF document text
    • http://grotech.in/userfiles/file/vojofetipamotujomemavo.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/wojotowifun.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/velebunogakexukarujipasuf.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/15108027821.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=soccer+stretching+exercises+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_off0000dc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0B 18040 bytes
SHA-256: 7fc4ab904cbd8a42ca70e0a899adac42ee33b5a80231a81ccc8d6990e181602d
font_01_sfnt_off00010aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAA 10868 bytes
SHA-256: 1158c39d6ccc12171636d5013109b60cd16aa5c686cddb75e042765e35095eab
font_02_sfnt_off00012381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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