Malicious PDF — malware analysis report

Static analysis result for SHA-256 94123365755a11ee…

MALICIOUS

PDF

74.8 KB Created: 2021-08-10 14:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4279e8861c23d937d0cd92130ba6140d SHA-1: ba2b8aaffb18c2c8c0c3ceccc6b464a18a9550cc SHA-256: 94123365755a11ee67c11eefc48fdf10d607d85b350d3f7d4700a649d2cc8634
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and other disposable hosting. The embedded URLs are likely used to redirect users to malicious content or phishing pages, aligning with the Spearphishing Attachment technique. No scripts were extracted, but the structure suggests a malicious intent to lure users through a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/uskslam28g24tjomkl2totcgh1/rudibezafaxulu.pdf In PDF document text
    • http://lab4050.com/upload/editor/file/saropedosarosuzopi.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/vutomo.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/59904555978.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b578d8f3d0f---72183157452.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086adb99cf8e---92269962040.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160e1cf6a8b4f3---wotirujubejabul.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/lumogelitiwapinin.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/nuxamatixu.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/59261638783.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/68ddb9d30ba4a6cc42e2dd22b0ec491c/62091146884.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/mifunovepiwidosajupebo.pdfIn PDF document text
    • http://parentini.it/userfiles/files/48988858918.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/88cd1160b4a70c81e5af344401da4bd0/bixelukemapi.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/84860787120.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16083670ce9f35---lolufakepizuparopusifoxon.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/69376311731.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/gosaniju.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e355af239c---beposotodaxinusaveruro.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ts9oslflflk6v9olu1pqi43e1/rurojajobadat.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/sj3a7sclb9ilca0hqv74h7dgij/47818508049.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/97ed4d11fb58c9e36c8fcb96b4a20d77/42277136027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=systems+understanding+aid+9th+edition+walkthroughPDF 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_off0000c108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC108 16180 bytes
SHA-256: 3ab29217f008d97dc9a9eff6075dbb0d342da6ac516a2292efc8a6b29ee46b0f
font_01_sfnt_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FB 11328 bytes
SHA-256: f6f7e10b1fb5906af08f4cc83199928e79614ab5002439c1072f082145fabcfe

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