Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f93cee2d7ab2ff…

MALICIOUS

PDF

91.1 KB Created: 2021-08-14 16:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f2ed75807a38aa04a69078ec8665b27e SHA-1: f9387c9f5f113c161442c35324415c406bb92320 SHA-256: 05f93cee2d7ab2ffb1b417195859da9f10be4b66f16bfb3d1d146813377da5d6
156 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://infrive.ru/uplcv?utm_term=how+to+clear+cf+code+on+aircare+humidifier PDF link annotation
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/gukrcqpdmko0nrtqarfjmkf7ku/zikubaripekalakumov.pdfIn PDF document text
    • http://abnicum.com/files/file/52257848496.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/4912583851.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/178dd22q86tbolnjstfsglc6mr/demizodezazerikidele.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/pomozobojemegevetup.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/julunovarep.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c48ca0d1db4---23737881924.pdfIn PDF document text
    • http://commune-bourre.com/userfiles/file/wuwavoxokufinadulapejeki.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/4c1dd1648c6bee11224db0f52db78cdf/givesekubazer.pdfIn PDF document text
    • https://unosms.us/userfiles/file/77123570862.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16116857b7356b---25008262090.pdfIn PDF document text
    • https://spiuruguay.com/ckfinder/userfiles/files/20496090488.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/aec4069e73c63243fb57205d6733f416/rikoxusitozipujejiwe.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/fd4e4a013ae765ff8cbd0489d277ee85/nojizitamoregon.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/96448615965.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/kisoge.pdfIn PDF document text
    • https://jagamimpi.com/contents//files/wadibuzusepevuxeg.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///pulefukoverazo.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/091f2b793d810d1975fca78ff4262f7c/zufot.pdfIn PDF document text
    • http://robbes.nl/media/files/86621918476.pdfIn PDF document text
    • https://epiphanych.com/images/file/solopi.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/fotorixoxipefa.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b91418b303---mutorebadenejutopiviwit.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/rebaduxitosiboxeru.pdfIn PDF document text
    • 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_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 18512 bytes
SHA-256: 47d180cd949d8ad48ba514385eac74fc81c9976fe237eec3f1cac2c42c2dc437
font_01_sfnt_off00012ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC7 10752 bytes
SHA-256: 7db33774e4206c3cf0f409b6e0c92483b72e1155985d2c46b6730168fd4b5dcd
font_02_sfnt_off0001434a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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