Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd290c3a1e08b20…

MALICIOUS

PDF

87.3 KB Created: 2021-08-14 20:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: de3bccdde64dd9afba6c3c86d9042f28 SHA-1: c49776388cb3d9a17ae0623e3ce754ae8c90dd80 SHA-256: ebd290c3a1e08b20650d599873593a4f33319c7391d8076b28401cd3c07c83e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://medvor.ru/uplcv?utm_term=enjoyment+of+music+13th+edition+free+pdf PDF link annotation
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609844399bd55---madibemod.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/924a8e52f8be8d81bab0e3180b886d98/nonimekojejopijidufo.pdfIn PDF document text
    • https://mollis.rs//files/wevikawukudozax.pdfIn PDF document text
    • http://askort.pl/Upload/file/77333303376.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ff072804f8a---tezukowizanidi.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/2747dadc68d2f735a7c0b47d46370cda/fosuwijemeso.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb509bcd7db---sasexevesijupokixo.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/zemibeziwuwij.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cb5b22ef0---gonisiti.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/3gp3ps3mci1rbkjd3qv9d22k6p/5186486061.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/615af95f056b3778ff24edc6fadbf74f/tigenafu.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/99449918521.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/zatibe.pdfIn PDF document text
    • http://mayjack.com/upload/files/54041296846.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/s0a3j5hjv637sl5oh1j4ol65ia/62398687721.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/waranesugeke.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/93563855564.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rvbn9cpvuipnbql0ukh1mgagk3/xavizurigixazodunu.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/498a442bc980cd9679e892c0c5a65f9e/kokofibonukejunana.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/83493092524.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/lajogexuxejumawolovezuju.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076930c43f36---rumif.pdfIn PDF document text
    • https://aneri12.cz/res/file/fizegux.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_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 19004 bytes
SHA-256: f3bf05e58c8827f45d2c265da83f526265c8c8d4892be42f2e529b17dcb8625d
font_02_sfnt_off00013441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 11228 bytes
SHA-256: 6da7373173e94a2fc920ff73ca45d1b84afd09bda31acfdb1bf8dbd2a0e9afd0

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