Malicious PDF — malware analysis report

Static analysis result for SHA-256 d770f92b734e0937…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 04:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8e581bc2ff4a52277d209fe6fdf0c754 SHA-1: d9a74274cce61f6c4a0ecfe4bbf05a03ab26faa2 SHA-256: d770f92b734e0937d7a23777de3649108abec8b4cae84be0512e0d2cb8abe6a3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or trojan delivery attempt. The document functions as a link farm, directing users to compromised websites that host further malicious PDFs. The presence of numerous external URIs and the 'PDF_IMAGE_LURE' heuristic suggest a phishing campaign designed to trick users into downloading and opening malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=device+personalization+app PDF link annotation
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/c47eb9cb017b925422c817ab2e9422fb/83745473661.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/27725203957.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16143e08e5821a---61834539010.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138a428b0798---92378603853.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/kunuru.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/welej.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/mapawaforobesoxup.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/fegeluvosemonifutetukax.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/zisolikoxoduvefebukis.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/pufibedoveropotegexadeb.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/81465573834.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/50891049098.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/nurokodonu.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/95815332704.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/43265602360.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/segudunavatigosi.pdfIn PDF document text
    • https://raljob.com/userfiles/file/55344095908.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51468444074.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/77351667153.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614eb8b4c7182---75468507432.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/34179381422.pdfIn PDF document text
    • https://hinaweb.com/upload/file/59282835466.pdfIn PDF document text
    • http://tartak-monis.pl/tartak/images/file/mojiv.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_off0000ae69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC680 10496 bytes
SHA-256: cc051983979283176f5ee2cb02d0833bdde82b4f16ed19e496d241d0aa6342d7
font_02_sfnt_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 14288 bytes
SHA-256: dddd83eeab30bc70923ac42ded8383eae64546855df958b8359fa44b1a8bd4aa

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