Malicious PDF — malware analysis report

Static analysis result for SHA-256 545ae582ad2404e6…

MALICIOUS

PDF

77.3 KB Created: 2021-06-14 14:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f490521cbb96dab96993ee47075562dc SHA-1: 4efbe675eaf836a6dd9a3918c305c34092fb5ed3 SHA-256: 545ae582ad2404e6b5b60788f5a0c65a082c614458322887543b598a4c8eed6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains a link farm pointing to compromised WordPress upload directories and disposable hosting, disguised as a movie download lure. The embedded URLs suggest an attempt to redirect users to malicious content or download further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://smidgel.ru/uplcv?utm_term=raag+desh+movie+download+480p PDF link annotation
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/bf7937e1f24135362ea349f96d6f3834/6858147394.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/61be43ca7843b98fdea685e9217364b5/63144778005.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/cfa8f88826cc47ad9f08c8a87b2dc710/36437676976.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/dukefa.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8c9a4bd77bc52c8c5beb0b1e5318bba9/wesajimobenibanakobol.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/88517298137.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/f69b3e27f76c0cb194baf0786beae88b/39693246145.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/77301118221.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/44885eaa1dba05cccb6741bb5f9d6737/dezetokefemako.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/gewamiguvulomi.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/40540110103.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b7608544e---27934160925.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7a0f9d122c116fb255260ce60611ebd7/ruxebutidi.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/36914069145.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/e7kfm80niehfqn80c5d74nc6bg/munofilibibegixenuso.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/putinivemogodivot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000db8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8E 5860 bytes
SHA-256: c58b069c8c54317693323f71eee16f80e177dd4e0dcc27ba1d1c014d992cd270
font_01_sfnt_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 10256 bytes
SHA-256: a12c582bfe74194442373c6f2bb046ff761df9be940d012a5083a87b97a0425e
font_02_sfnt_off00011303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11303 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3