Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25fd496240cebec…

MALICIOUS

PDF

72.7 KB Created: 2021-09-23 03:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f02a881c0a0ac38675d0ce9a933b208e SHA-1: 261125d29a85772fe83f94fe9365e8bb0e69038f SHA-256: f25fd496240cebec58454bdc12075a8b6bdd57d3bbd1e232e8895162c39fa16c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristics indicate the PDF acts as a link farm, directing users to various external URLs, some of which are hosted on compromised WordPress sites. This suggests the primary goal is to redirect users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://gibisch.com/files/files/43874785524.pdf In PDF document text
    • https://conexkarvan.com/cache/fck_files/file/mubuxutabig.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/xakataburigepasojo.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/12830858586.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/dilejozikepujodipa.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/a6d9af7dd614570d5f050d0a42f6291a/8299567484.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/35127560048.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/221586829.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/3898277042.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2fc04e2ca---vedosesenazerulewe.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/91047731697.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/bomojedufurajidudeneve.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/vajewojikiduforopogupop.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/kejagoxuwagifikuk.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/coec457nhsrpfr9v4rbp753qb4/87761842646.pdfIn PDF document text
    • http://hejia-ele.net/upload/60904337373.pdfIn PDF document text
    • http://ck-buhgalter.ru/userfiles/file/luvesexugipazaxabixurofer.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/65919588639.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/gatefaxipowabimomad.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/69404482692.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/52d075adeba25d1eca3ac7ec1066d34f/biwefuku.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210901191631.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/gireguwisalurititusepi.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/21/vivifexuvazuvufafuwuze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=management+the+essentials+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_off0000b949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD160 10720 bytes
SHA-256: 6ef63e82077fd12113c9e8be30147f107dbd023f1ac7464f1532be25eeb917a7
font_02_sfnt_off0000e983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE983 16988 bytes
SHA-256: 3e65c2139963933e48132a9d39b4254712578e79307b250c9ab456a26f32d637

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