Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6b7ce5f309d423…

MALICIOUS

PDF

86.2 KB Created: 2021-09-01 04:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3c79de587e961a38b20b00ab0841b68c SHA-1: 3bfe6bc49a788fdd3dd3c1a48588011de04e59de SHA-256: bb6b7ce5f309d423f9e8bd1fdfd05e2d195a7192546e0d965256c0de50e0c55f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a link farm attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/bbfd3bb58452b0bcad9fe39f3461a337/97071230407.pdf In PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/13718211563.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/74014097802.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609667f878855---85197128431.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/a04681e38b1c5716745aecf70af2a2f6/lojoruxunuvuzares.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/4cf3d4d6650965d528c697d8a17709d0/nutixiko.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16098f3df9f69d---livanaxi.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/42373729312.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/dulogiluxowupugabakeguku.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/69251620070.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/bibulukefiwelamimokog.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/5985122153.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/s8r3r59r50msfb5gt2dfjq7su3/8471568576.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b54896ca498---81081219822.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/kebovozujokusideruwofug.pdfIn PDF document text
    • https://epiphanych.com/images/file/xazebagudifinob.pdfIn PDF document text
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/11107489505.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/10364001364.pdfIn PDF document text
    • http://gkia.org/kingkong/userfiles/files/jotuxirenafoluzisamit.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/xuxetad.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf658d4b76---gipiwusagixipowomosuvugen.pdfIn PDF document text
    • http://pbsdeltarho50events.org/clients/d/dc/dc3fcb918f61c9276c5829b035df2abc/File/82589784773.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210701_8C534B8C8DF63EDA.pdfIn PDF document text
    • http://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/vimunukefu.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b113bcc6e---99362696230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=march+2021+printable+calenderPDF 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_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 10752 bytes
SHA-256: 46fd96f17ba5b51f3e7bc42f7bb96216446e7fcc3edfa9496d8b813806884440
font_01_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001164a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 20132 bytes
SHA-256: 94b7cabb4efa099c6876836fc27ce1c144735bfec3e962e0f4e31a46068004f2

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