Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1e761b069fd864…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 12:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ec41d1d2a4173130897fd931888abba8 SHA-1: 7bb00474c06eb5ac200882b91dd69cac56b77a20 SHA-256: bb1e761b069fd864107488534d9d81e319b3750755dd199e432a5f8e18dc0bf1
134 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 heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous unknown reputation URLs suggest a phishing or spam campaign aiming to redirect users to malicious sites. ClamAV detection and ML classification further confirm its malicious nature.

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
  • 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://lapempi.nl/ckfinder/userfiles/files/53383881200.pdf In PDF document text
    • https://actionsporting.com/userfiles/files/givadun.pdfIn PDF document text
    • http://stl-hk.net/userfiles/zoxovivemozuwujo.pdfIn PDF document text
    • https://forumsevens.com/images/file/wezakobakisutunilelen.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/95561250863.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/63446955878.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/dedibatapex.pdfIn PDF document text
    • https://glozor.com/userfiles/file/fojewavejo.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db661b2d57---9509147111.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/pororit.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/kapamiguvajadar.pdfIn PDF document text
    • https://servauto.fr/img/user/file/zibamu.pdfIn PDF document text
    • http://sns.hu/_user/file/86522619500.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139591a225a4---fomemosulopevamepevusim.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/75720530414.pdfIn PDF document text
    • https://rjpexport.com/files/pawopamizop.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/96978876296.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/26470301223.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/40783593890.pdfIn PDF document text
    • https://kalimati.in/userfiles/file/juvoduxefateziguxivetazo.pdfIn PDF document text
    • http://sbsinternationalschool.org/userfiles/file/buseno.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/botod.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/migibegoradeselepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=linux+app+for+androidPDF 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_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 18056 bytes
SHA-256: 23c3bdde7c86d15abee670146f7deb622b168b457d544e4534737aef52c399be
font_02_sfnt_off00012ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA2 10204 bytes
SHA-256: 357c376fb3c770d593a8ba84fa6a7017b43a2617364af91ec3d6831608e7052b

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