Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d54027e5b7332f…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 21:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 68356af5a8f8475383a74005775726ef SHA-1: 46f1ee0bc801af56265eb42349bef6af8aba7a6e SHA-256: d0d54027e5b7332f72337021cbac23b1639129c327a94447f497925fbc1e43f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://chcial.ru/uplcv?utm_term=my+talking+pet+app+for+android+free PDF link annotation
    • https://gamepinleri.com/calisma2/files/uploads/44506644721.pdfIn PDF document text
    • http://lgassociates.in/uploads/43459405266.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d25153436a---majeruwejo.pdfIn PDF document text
    • http://poorclarescork.ie/images/4897635659.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/40272621985.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/61992357841.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/54202073730.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/97154962886.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/kulixutibogogujupopif.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/mebuzafozitijaxonas.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/79862552325.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/34455469749.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/d8oduq4k107p20mjsh0dhok87t/posoz.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/gebuzetotul.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16137977044c69---27835464622.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/gufoki.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad9a234105---69854704458.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/ratejaw.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/30164765520.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/35189111626.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/5823e76c46b1a122187b574756f1238f/xaziwifow.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1614f2f09130b2---sapatisofudibofewugo.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/zukede.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_off0000b0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D7 14996 bytes
SHA-256: e5bcd4384c7c7d902736d76516b1d03aca530cc03ac6843d9fd1561670ba2fd5
font_01_sfnt_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE35 10704 bytes
SHA-256: b12e0dfecd52a33dae00bb5a9e92d6e8437cb0e16839b3ece97a3fa9fc6fa157

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