Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7f5e1ee9c507db…

MALICIOUS

PDF

109.9 KB Created: 2021-08-01 03:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4a05893932581099429a3957ae04f45e SHA-1: a3b442636ad3ca3c636102144a9f90f4b9588b58 SHA-256: be7f5e1ee9c507db65cb16a79984d975b52f89a9c2d9c65834623c55682a3d7c
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to a variety of websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The presence of multiple distinct hosts and UTM parameters suggests a broad campaign to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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=a+streetcar+named+desire+mitch+and+stanley PDF link annotation
    • http://jgbt.us/pds/userfiles/files/xajebisusi.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/norogaviz.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/r9obflota7qqopnqpuccrlkl8d/62288944835.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/0bc330253b506c728e2bb9b06ed2e393/50914877603.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5c816fabf---wamotixukib.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/8bs0khifn9g5ka55i878qeed1c/tiposuzebedugipofutuv.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/bekuwojepozajusuzirafif.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086247142fb3---64645177459.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/11fee05397857131445746113380c678/kegeraf.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/13721162179.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae299e89373---xelelapaluradosigeso.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/bunavuviwovoxanidezizawot.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/66660145622.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/4146514659.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e76bf7d191---sawenagetafoserizitajazug.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/vafigexelevifanufakalu.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/61689286856.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/nakevogejuj.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad04719b33a---fobagexagi.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/zejiremileboratukodavi.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160719f6261d7b---jewitegeros.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/jafesokevanafolotula.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/kereworo.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/vonigunumigarafev.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_off00014c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C94 17184 bytes
SHA-256: d1157387899ff477331f65a37372a1cce185627aaf830086e4b71c00455fb27c
font_01_sfnt_off000178d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178D5 10612 bytes
SHA-256: 461d182ebc09135b5f81d41e5f0e2d8343fe96317934d58d579ca3cbba5681c2
font_02_sfnt_off000190e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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