Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1df795ecf340ba…

MALICIOUS

PDF

78.9 KB Created: 2021-09-19 17:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ca4a58f33aff830f8a4be004702999c SHA-1: 330bc1549e97d22d329bd867d4e9405483b949c0 SHA-256: fa1df795ecf340bae3e10139a807eb8bd07ca3c20a78c664804779a8465f6431
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

Heuristics 7

  • 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.
  • 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 http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/votedoxiserekor.pdf In PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tudexedudiweli.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/31782786840.pdfIn PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/31921192749.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/bekowutugolufek.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/33471655986.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/45680452125.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/jitixapixepakuwuliredom.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/jowunobuw.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/t6numr14jlvc0e9b7jrcckevch/botemolaxivavorixawema.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210905070604.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/44712881344.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/53269422502.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/jefuja.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/tedaxareliku.pdfIn PDF document text
    • https://ckmandarin.com/uploads/jaduzu.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/25331159185.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/n26rda4vqo6jbb8om1om9agmf0/77190349964.pdfIn PDF document text
    • http://yibetter.com/data/files/mefalogujesotosokeboxobe.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/suninofobakefupitamupu.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/wazopibenoteginevi.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/45145916388.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161445c3593c14---fogoresu.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/25919314486.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/kaseguvugo.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/16814075454.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/6173864476.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/44786375353.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=joox+app+download+apkPDF 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_off0000cf95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 10068 bytes
SHA-256: 4f65c9374617b1a80ff8c337d942936d9f99f15b0fac42a78f40cfb9365ca649
font_02_sfnt_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 18200 bytes
SHA-256: ce34f8f879f60e676beb24932ac564d269b7026e7bdfb6d00aeb51f1a84b13ac

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