Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee145b9594168d8c…

MALICIOUS

PDF

135.2 KB Created: 2021-07-26 15:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c5c1e42d7745108b31e9a1df4a5ad281 SHA-1: 509db812729b11fef7e60fc7ecb01f69912a6a87 SHA-256: ee145b9594168d8ce12ec05949ddfe12ba8850de2afc766ee6024ad366a34376
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly indicated maliciousness. The presence of numerous external URIs and a link farm heuristic confirms the document's intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://medtravel.lv/images/hand_uploaded/files/fenunelimiv.pdf In PDF document text
    • http://skiflogistics.ru/userfiles/file/44135842373.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d314bec16---14693969901.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/76609152586.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a6aed2a08e0---sijafaridaxemizit.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16089ecb76ae8c---33990352493.pdfIn PDF document text
    • http://planbmedia.hu/files/48262347486.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/cc4db59d0fd572fd2db017e65cf21986/38264083923.pdfIn PDF document text
    • https://betibg.eu/webroot/img/files/98651938477.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/8f7f48105895b0766b96fbac17d4cc7f/zejozewepir.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d7518501b---nolugaritik.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c767564f2b---guniwuzema.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/xanok.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/fawirafujikixizok.pdfIn PDF document text
    • http://attlas.center/userfiles/file/suxubixilikamutuw.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/sugusupegulibaradazigob.pdfIn PDF document text
    • http://skupka54.ru/upload/m/40613460605.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/0lo0gvdqrqdocrk363tog03ri0/10074326729.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/bijivabudurudulad.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/20b3aba9b6062451fa62fcbfc9a3b0b7/91240106751.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5c8543e9fe80adf2474ef0de2df41f7/xoluranezokowudoxofuriba.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/uu7n7t3l9nc8nsa8a5nto0ujel/razupozanopezupu.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/kapefenamibema.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=qatar+new+labour+law+2020+salaryPDF 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_off0001ae33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE33 17420 bytes
SHA-256: d531bd14fd9939d21f47f4262a1f51a1252145d70156286351d88e3cb32ed47c
font_01_sfnt_off0001db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB4A 10748 bytes
SHA-256: 2e4c55cf92547b5afa9222d14e38fda0f4332ce627425583f6acdc3628b8374b
font_02_sfnt_off0001f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1