Malicious PDF — malware analysis report

Static analysis result for SHA-256 865c54da3946aa41…

MALICIOUS

PDF

85.7 KB Created: 2021-09-06 15:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8894ec7cbef2743a7a2b1091281cd39c SHA-1: 5c0378a7c03234f269ad45812b7917424d7e8191 SHA-256: 865c54da3946aa4119133ae5b031757eaea4e6b3d04f8e4b7d1e96c3127837e8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing campaign. It contains numerous embedded URLs, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm designed to redirect users. The presence of embedded JavaScript further suggests potential for malicious actions, such as executing further exploits or redirecting to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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 https://pistant.ru/uplcv?utm_term=divergente+libro+pdf+google+drive PDF link annotation
    • https://nabijdefossa.nl/upload/files/xabibogenejiwujikusimipa.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/f1baafb3eed372999de9e14f55feb2bf/28225902584.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/wolukalitoxadujofedij.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/70536074331.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/9058636367.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135743a0a6c5---daxorarabivotesuzuvoloza.pdfIn PDF document text
    • http://potlista.com/file/files/90989677788.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/42037609109.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/37547200455.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/buguvox.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ce788188c---jupugusogogosumogomotak.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/63707403718.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/zogamu.pdfIn PDF document text
    • https://beaszemin.com/files/22200969084.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/vewulizerobogiwapi.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5afd98533---bisetikeludomimivimijipi.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd962e5ce2---javigigebupikajipe.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/jogawitulivelamerejafifuw.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/4ccc8e51d132aaa218bdf3f09542ceae/45842429638.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/63441746672.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/fubow.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/97339548984.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/4805994685.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/89996075426.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/dojajefexamovejefimigeju.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf828b34c---42073469762.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_off0000e0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 10552 bytes
SHA-256: a5e87378895cb1f87750e1b9645ed5973a2bb96fb8a947e15887ce062d0d9498
font_02_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 21024 bytes
SHA-256: 948e5240cc3b0abdb1759885cad62caa7e2bc888efce649b211b55af6886c92c

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