Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e75c50a1971672…

MALICIOUS

PDF

83.5 KB Created: 2021-06-29 03:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 74631ec87f01a25419d3eba7a8ca0845 SHA-1: 0b17b9531fc63908fa056ea438e26c78502a21f6 SHA-256: 19e75c50a1971672f025689289a0009f0963e3b60344f8480d788ecad66d3364
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The primary purpose appears to be to lure users to potentially malicious websites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://berbagiangka.com/contents//files/31138987380.pdf In PDF document text
    • https://amblamy.ee/upload/file/wilutadigavesoza.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/rcai793k21kkkf282g873f9smu/5848351960.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/50577562525.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/080fb1caef7f6c5ab2280dfe622b9e93/lasavimeriwimozurewosi.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/jodenapizudogivuwiz.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/2021523184715.pdfIn PDF document text
    • http://anpo.vn/upload/files/juladalusunowujigi.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/1s50fh4ul1jsaqmst7uv582an1/37250192643.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/f111bb7e04dbc443246a1c614b790509/jelikukituvux.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/41598766793.pdfIn PDF document text
    • http://learningkey.org/userfiles/19261109027.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081951d84444---10931165299.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/e3746b7bdc5ac7a602f8ecd4aaabf333/99191530926.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/kawagaduwenusuwaxudetipo.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/buvegenagojixovu.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2610f573b2---69036425107.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bce408a44df---39870388645.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d19f6929a6---7998821551.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/revagep.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/tidetojowipawobejowaf.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869b802b002---17487975546.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160729b4155919---59888720745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=where+can+i+learn+how+to+ride+a+horsePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 16628 bytes
SHA-256: 4ed61a65782f7b8b2300d21cd8ec301208dc423a30d0601b528a5c72db867c30
font_01_sfnt_off00011073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 10548 bytes
SHA-256: 1701f653f0fface5959de96853fe041a52262185d2e9b395b428661c14cac260
font_02_sfnt_off00012883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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