Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc738db7d977da2…

MALICIOUS

PDF

82.4 KB Created: 2021-09-16 01:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: cdbd14ddb2f9d85d6f990cd882ce8d65 SHA-1: 0e849ad740e90b12ff705d2eda70bceb3d3c20bb SHA-256: 2dc738db7d977da28b37388961dea5523cd846c6f028fe22034ecb99b81da0c5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, which likely serve as download locations for further malicious payloads. The presence of external URI links and the overall structure suggest an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pistant.ru/uplcv?utm_term=123movies+download+app+ios PDF link annotation
    • https://srsatta.com/ckfinder/userfiles/files/buzezevikel.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8sgi3e2h1ldhjd1sg170unqev8/82092216088.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/doretunofel.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137984c450bc---retakikavukixoto.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/13670958788.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbcfb0af11---nupumuruki.pdfIn PDF document text
    • http://trieuduong.com/images/Download/75881016519.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/wimevolorolinibeb.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/xokunozi.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/noxogizatekelakemekufora.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ab5ce8acc---xatuloxuduxaledawavig.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/32065100804.pdfIn PDF document text
    • http://masonhn.com/d/files/36596519586.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/31308049316.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/dilitatojukat.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/revivakexezawumisowimot.pdfIn PDF document text
    • http://01host.ru/userfiles/files/86916942761.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/8935372131.pdfIn PDF document text
    • http://skncn.com/u/files/ropanurotapem.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/4764147442.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/satujakepaxavoto.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613321639e943---kuwane.pdfIn PDF document text
    • https://tarsiman.ee/files/file/83753842727.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_off0000de21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 10752 bytes
SHA-256: 1f8cf3ed2ccd9030c3b71e21e407e2adc7ba9a834a00185efa01d9906e20e5af
font_02_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 17512 bytes
SHA-256: 55120afa0938b378229a2f18e8b7907ffe848474b7ef491c1a22ee080464c1ec

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