Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a04337b01e2c9f…

MALICIOUS

PDF

68.9 KB Created: 2021-09-09 19:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fb697cfc7e8e0512ea4abaccbf6a1c4a SHA-1: 96f7f459848b0500ba0ce75b72ac5b2406dd2f15 SHA-256: e9a04337b01e2c9fa4af18531ee4d282fef4391a1794ddc59237daf6ff401b56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=best+excel+for+android PDF link annotation
    • https://avukat.dnsaktif.net/upload/files/33960765211.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/95716300892.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ada38cf64---96630788180.pdfIn PDF document text
    • http://pincodehub.in/userfiles/file/doraxewuvemevin.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/de29707a20bf11ad73a8c1cee1db659a/95196234587.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/0bdkgoice2g7njf8678569q6d7/84884384725.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/belesadubudesagevu.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/mabafupig.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/62339524488.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/wepis.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210904_5850192F3E876B12.pdfIn PDF document text
    • https://slide-bearing.com/d/files/20606056020.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32332747477.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/22488078695.pdfIn PDF document text
    • http://retailcop.ca/files/xasibagojoboteninirawifek.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/83563995689.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/48951451415.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/30225477212.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/389556457.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/92271518804.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/rigugagarijinelexezaruzev.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/86apgu01b5nh00u9ghv163lhac/moxojiwinevavugilutewa.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138f7869d04b---kinebukosa.pdfIn PDF document text
    • http://canadianrockies.info/files/file/21626868412.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_off0000b02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB02C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83E 15096 bytes
SHA-256: 4ee33822ea7377e928b106d945be8116ca4e025fed279cd234ea72c8e5882f81
font_02_sfnt_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 10624 bytes
SHA-256: f16b5c4a5606f40429571604de917e0a256d58442d20a4a183dc859264b78ff0

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