Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fcb4400f2370b74…

MALICIOUS

PDF

88.4 KB Created: 2021-08-28 21:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5843038d24767eb3b27aefba378df967 SHA-1: 49927e9caa8e9761e71be1a61b06f9b2bf9342eb SHA-256: 3fcb4400f2370b74ac67deed3ac3fc350967af9c47afb2555630dce3cc6e12d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of link farms on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of these links indicates an attempt to lure users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://thedewakohchang.com/image/upload/File/umove.pdf In PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7e982e01f9d912de08f6b4c6c87a526a/23995959192.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/88132704559.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/55122695988.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/kabixadimavifozopuduju.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/taxepidojiva.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f1b31407d---xoragefesasifew.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/72700953390.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160776c5ac2274---rodizasonigedu.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/sukunev.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/bikavavorarenilut.pdfIn PDF document text
    • http://wfuchiomega.com/clients/4/46/46a815049f9cfb11ab63b386d19cdfb8/File/92164386152.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/zuwuroxagalorofubinovovi.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///rilimezevegamodo.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/24190061212.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16103a61dbb8f0---35576749787.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae503d70d7---pexaduxib.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/20848735598.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/09bb0dd4ead4d3eeb3b7a62c9eece6a0/wesadoruxepogodedefi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd10c773f1---natuwofifasexawob.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c04919dde---xokazivejerakiboxakuti.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/jajelidoziwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=today+richest+man+in+the+worldPDF 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_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 10800 bytes
SHA-256: ccf30ceb4838c4701e0d6a7d81d16f6cbcfbc70405dddb765f481409ae1bc734
font_01_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 19700 bytes
SHA-256: b4ddf7e2ef1d674061c0406b6e3f7d036cef9ed05659d86ddcbf9bf8fc7682de
font_02_sfnt_off00013b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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