Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9b22955cd25f21…

MALICIOUS

PDF

84.9 KB Created: 2021-07-18 03:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2ade7fdda9339da950b1b662e4c281de SHA-1: 270b61861a6f26f830bf1407e78a93d13921a0e2 SHA-256: 7e9b22955cd25f218873974b3f35fd34eed713d45e39cf80aee343913517bf63
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious destinations, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d54543e26---4427494491.pdf In PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addb6d2e84f---99106921734.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/64470801407.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988da8957cf---2601355211.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/furamugo.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb83be1275---48883091125.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/mnb3rmttkoq59ke85v2ksaab8e/rinenurure.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/5sjeh5fkcnksd5a93kh8p6rgpu/rasapekir.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f9fd8af91---kajopukosebusima.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/2616974cccee6ab2e91d6bbb2129baca/tenagojaviwizegalejigo.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa72a28cdc---73598414512.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d35165a1a---99390954755.pdfIn PDF document text
    • http://rentaruedas.com/files/others/xizirivebixewog.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/12447213324.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a32542ea74f---xegetujigitetopogan.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/99230418238.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/07v698aed1lah3eudr9r767176/fiduworejivuvogon.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7ff1eeb456180608b5c1e433a7a27342/diboxonaxufawedosogazape.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/60554360369.pdfIn PDF document text
    • http://passionsavannah.com/clients/0/0a/0a61c075fa1d7d91f8ce2ef588f7e9ce/File/76660763361.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/e5q2jprisl91ac2ocerrqmhlfk/55352686211.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/bariwadivajevanivogaz.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/rosanegagewurorekilojuwa.pdfIn PDF document text
    • https://langumeistras.lt/i/File/37000632697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+return+of+martin+guerre+book+pdfPDF 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_off0000e74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 17484 bytes
SHA-256: fd2c28d523172529dedb00fc5fefb66bb4405d771b3b357d08f864b581602e43
font_01_sfnt_off00011547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11547 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5E 11024 bytes
SHA-256: e336cd9a8c6f019e53cf0c6794bdc67a3ea1d158f6c202d6f9c06f02c33615bc