Malicious PDF — malware analysis report

Static analysis result for SHA-256 1396fe864b1d29bc…

MALICIOUS

PDF

87.6 KB Created: 2021-09-18 06:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b89d5594f19bc84f2c6a16482fc0a57a SHA-1: 21bf663bda0ca08ff6da1dc10f419942af710df1 SHA-256: 1396fe864b1d29bca2b47d8fae26a4263858d55a729bf2132b16e12dba3e181a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and other potentially malicious domains. The embedded JavaScript stream further suggests an attempt to execute malicious code or redirect the user, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7cf73c6c---73357048787.pdf In PDF document text
    • https://albawadiroad.com/userfiles/files/bisipameburulolox.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143cc649924a---fajakodevelapideji.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/41514007582.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/d6648d1188450b792d14982385424ff1/xukorumexabazejopapan.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/96982142755.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161425d45e74ad---sivopokufonap.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/22922497505.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/68182943298.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/mobima.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec04887081---jigumuzonoritowexilir.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/r2mt8cutnul5pp0gblqibg2sv3/50474877113.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/13211828618.pdfIn PDF document text
    • https://www.algeos.com/js/ckfinder/userfiles/files/lekapogamelev.pdfIn PDF document text
    • https://anjingliar.com/contents/files/ziluza.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/65205794364.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/80101490795.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/wadoruwimekajuvagax.pdfIn PDF document text
    • http://silver1979.com/upload/file/xajapulemopewa.pdfIn PDF document text
    • http://grimastone.ru/files/nozunid.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/14562845536.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/31638212256.pdfIn PDF document text
    • https://jagominum.com/contents/files/tigodeker.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/movinikosofabafemipusega.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/83935506240.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/morujowasewerixuxukejojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=live+football+match+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8F 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9D 22384 bytes
SHA-256: 6420ef9d6449256a586dcbdf8d66142db4e9b262ab94e6c5e11468a6f3f7bb50
font_03_sfnt_off000137a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A3 10628 bytes
SHA-256: 964d72bf1c4f2bd39615ae6999377e1208f22e5821e1ee719541d60b3b1e2b70

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