Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7465797a5c3b6d…

MALICIOUS

PDF

79.9 KB Created: 2021-08-09 07:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c73596340108309aafa9acbde7f2edbd SHA-1: cebe6039b27e5a949d57c467f8757cfefd6d923a SHA-256: 6e7465797a5c3b6d64f4e36c76e42f4f21e20a9d601e0764766ea6a4dc59dc43
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised WordPress upload directories and disposable hosting sites, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary attack pattern involving the exploitation of user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 https://keluargamimpi2.com/contents//files/8473517517.pdf In PDF document text
    • https://aucordechasse.fr/vosImages/15401870659.pdfIn PDF document text
    • http://billsky.ee/files/file/jukamobatosigigoviwub.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/zimipetizobimimov.pdfIn PDF document text
    • http://pneusmarene.it/images/file/relulagot.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f5dfebfc9---pometekake.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/69302449332.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/67144828441.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/46339448853.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/8e19d7a30b79cab513bfe8e5b9607f4b/31961047708.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16070a481e05a7---41378222171.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/2dab016d4ecab8647c2127212110753e/gokewanefoxuzevapiroseri.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/sajibariwokurego.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/nijeguvufenedizexov.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c90f175ebb---82442914584.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ivbvmniho7r3rvgkifgokvvtb9/pukolipewoxoxodobufat.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610db8ea1ed07---janisoturodemurumanuf.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1cfc34f379e4223ba51ecb6b622d2c7e/jufaja.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/5057fde792dedab18a456ca822b0a54c/88565474475.pdfIn PDF document text
    • https://pellevah.com/upload/files/pojefujavizeka.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/hdori3im18nfifnqfco2ucvm50/92705550216.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e262a1f739---tufiso.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7eecd33d8---59477854794.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774c79b14db---16336390460.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/sukamezomigizasuzatex.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/jevuzisodivineb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=examen+lainitas+segundo+grado+bloque+3PDF 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_off0000d1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 18400 bytes
SHA-256: 1db6d8189a1debb9747627206387cc69a7d2eda7fbb6c3d75b49aef2b04d7fdb
font_02_sfnt_off000117a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A3 11236 bytes
SHA-256: 5fac3d2c1a03cc2ffa3a2c52c01f074183bf20b079003d918c1466a665506a44