Malicious PDF — malware analysis report

Static analysis result for SHA-256 82df347090f95439…

MALICIOUS

PDF

96.1 KB Created: 2021-07-28 01:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 30bd7301e0a681278d06cf91fabbf24e SHA-1: 925c6893fd68c245af261510b749f92ccb549d2a SHA-256: 82df347090f954393c5714e356758d099166ce224004c209c415f33f4d9c0e48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded URLs suggest it is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/tofok.pdf In PDF document text
    • https://alshaabcoop.com/userfiles/file/20987653718.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/powerodorikabadufemo.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/41i77s2o63kpbsfa8goqfbn3q3/kegulezuvedarozo.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/bd2498i249p96h8n0jhdendc74/womidelomujabamanuwufipu.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/zejojidefajajerope.pdfIn PDF document text
    • http://alvirne88.com/clients/71477/File/32613368214.pdfIn PDF document text
    • http://renovator.cz/files/file/kutakatoxofole.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/24615608389.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ce041fcbd---fisibafoz.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/21067965416.pdfIn PDF document text
    • http://test888.org/uploads/productsfiles/20210704005435_36312.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/jijoxewegirufafugodu.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160e549f57f255---xuduxeze.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/7083538183.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/59245475229.pdfIn PDF document text
    • http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/suwufu.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/ug24ghpnljgun5kgfnai9j7q9r/pufowaretalenomot.pdfIn PDF document text
    • http://btfa.tw/upload/files/meremoxovababuferejedidu.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073ad94bcbd7---36490636141.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f1000e323---bevaronoxijopa.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/7ac9d0659aa393faae248bb7dda95b44/72088168420.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/85633590350.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/b95fe829653aae93ac85554dbd0b960d/pekasukemuzuxuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=guide+gault+et+millau+2020+francePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 10912 bytes
SHA-256: 7b058e1052708816f868ef708f4909aa29156934c6ac32c2f0ad148b8ff0edc6
font_01_sfnt_off00010dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCC 22140 bytes
SHA-256: da69bcd064bd2b242812a3a3f09a18af589573ac9620d96cc1e380a12c9842e0
font_02_sfnt_off000144e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E1 16100 bytes
SHA-256: cd995502891255dfbcf4afd28e083ab8bfc87dc57603266f4586087dd25ac3fe
font_03_sfnt_off00015a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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