Malicious PDF — malware analysis report

Static analysis result for SHA-256 f502bf1e69698949…

MALICIOUS

PDF

69.5 KB Created: 2021-09-19 02:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5cf65a7c095228bafab95d9fb319ec2f SHA-1: d2c9b81bbf688aa27fedee53b9af4abbc36605b1 SHA-256: f502bf1e69698949d4eae204c0d8d33670a8ecda3d4b2e1fa9d255282963e770
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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 69 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cosmeticdermatologymiamibeach.com/uploads/data/files/41348245081.pdf In PDF document text
    • https://elmawadah.com/userfiles/file/bozulefegulevebupaso.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/56457968403.pdfIn PDF document text
    • http://surtek.biz/image/files/20150324_225725.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/90705429351.pdfIn PDF document text
    • https://brukspec.pl/upload/file/84809265464.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/o7fvatm4j94dupdj2q4ci0cnst/23741595074.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/54044769901.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/39574837726.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/a69a2tmh114pgi1ank0bmu1c6p/rutefujas.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/55278489817.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/62965693927.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/naboxe.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/8899184169.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/98582044429.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210908180526.pdfIn PDF document text
    • http://olympusflights.com/files/files/84067312901.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e76679a9da8e2b848e54893e89c26c1b/1234046451.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/9973152646.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/55538547689.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/eab6aee824c42f1de01e2d80017b8e13/9860114043.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/ximoxorotobaxitowotap.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/fafasevavinepegivetupobi.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/3389596642.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/lizujusinevorenamikoneni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=wwe+2k+battlegrounds+locker+codes+2021PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2CD 11156 bytes
SHA-256: c0829bcc757c9636da966fef083779c93d2596bb0d4372bb4cbf75e9421eac56
font_01_sfnt_off0000ccfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 14152 bytes
SHA-256: 1860d838bd4ca6276015839aff12dd7d4aa613526b80816945b3600e27badb85
font_02_sfnt_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1