Malicious PDF — malware analysis report

Static analysis result for SHA-256 7964463330ad95b9…

MALICIOUS

PDF

86.0 KB Created: 2021-06-29 11:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 88fcabdb9ec0e299192b054173d3e9fa SHA-1: 79e267e3b7de6c1b384137b4de73386766e4aa4d SHA-256: 7964463330ad95b9e26fffa0957b9518cd79a6e40e8cc51080967d96941131df
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, each hosting another PDF. This pattern suggests a phishing or malware distribution campaign where the initial PDF serves as a lure to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dc936faa6---27761506837.pdf In PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabbd5ea608---21165285337.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160ae705c1cc4e---65495921712.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/6fb7ee82b76490e71d0845ecf11106f3/30008113973.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/buxuxujo.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/40640202444.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/69259256089.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/mobuz.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c2a19600d---fatukizogo.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/aa5b08024f325b416a4de8e2e7ae56f5/vanolapiragulani.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a03d25924e5680598b79bfadf2cd2f13/pitebulege.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/luwomepuxidibux.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/62924149483.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c91b81ed02f---19843587746.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/8193db9cc1f6ce11b88e73b68c59f0cc/gakumujazubote.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/boxufiduleva.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/xisizedusojabavutiwatopi.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/5375944338.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609db2a49ca27---66796290831.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd72208ec8---piwupedefisogosopubar.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/22b28542ddba253946e8b71b90160008/23514595712.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/7558767099.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a9f8d1e86---viferegotafapufebix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+many+units+in+s+bottle+of+winePDF 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_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 10704 bytes
SHA-256: 6652bd3fce4f4eeb3b405b1c977bec46a768b31d8ca78731564862b4de59eda7
font_01_sfnt_off00010443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10443 17932 bytes
SHA-256: 9d54b922284110699a93f892e1c399ecb3199c0aff5ae6a10d89ec38c7970f59
font_02_sfnt_off0001324e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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