Malicious PDF — malware analysis report

Static analysis result for SHA-256 c629000dad4f5ff7…

MALICIOUS

PDF

99.7 KB Created: 2021-09-05 22:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 12fdca7ff8994da86649be2de0ba1645 SHA-1: 240b862d69f585074b48c866e1d71e0f0ecebcca SHA-256: c629000dad4f5ff7cb18c058eb447a76e1fa6965b6918f9f2292ead9bfa758cc
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 0.9885

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://synerhu.ru/uplcv?utm_term=deontological+ethics+theory+pdf PDF link annotation
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd6efdce1e---kawedekozog.pdfIn PDF document text
    • http://markone-tools.com/upload/files/97610295306.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/zajupedotorakok.pdfIn PDF document text
    • https://latework.cz/soubory/11026960041.pdfIn PDF document text
    • http://fotossc.pl/_files/file/rolunakijiwamiwe.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/dc1fcf97f6053f5477543ef8c04d2d65/wugetotixuz.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/44105801140.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/witiwilexajizigejuf.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a41cfee2b713863142c69f61ef966447/77906055831.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/74058578809.pdfIn PDF document text
    • http://chamdure.com/DATA/files/zudunenaxikopabexemem.pdfIn PDF document text
    • https://aedwea.com/upload/foto/31247176147.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/gtuhmnhacdd627po33r5q3svho/xaxano.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/56964728091.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/fajikemesam.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/dajupetijem.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/2890885082.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210605135423745.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac481eb68fc---sipepopetalexunepesukag.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608000a1541a2---61568850438.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/77403288183.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/3505872700.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/6ab83e71e381b65115779555caf377f8/65873396047.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/saxoxupaba.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10069 16616 bytes
SHA-256: 06f1d5f5a9083a80364da0885936c8ddb2848b41a67694407b5e75bff462a068
font_01_sfnt_off000117b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B1 11012 bytes
SHA-256: 7ec5e677019ba030a6c3ff7c2b3c2d5f636819c559465e6aff9c1a2d55762f32
font_02_sfnt_off0001310d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310D 21172 bytes
SHA-256: aed1bb38d2a48c030964d162c1e27737ca5b48b637bb3101b4eba743937ec849
font_03_sfnt_off000168df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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