Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc30895aa734dd56…

MALICIOUS

PDF

77.4 KB Created: 2021-09-14 06:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 975df7fb06714a5930b8c03c7d22ef3f SHA-1: d414ad638c7aae39c154f9b1995eb53c82805a52 SHA-256: fc30895aa734dd566b6e007e51927d9668853ac9acc26381019767b1241f1645
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded JavaScript and numerous external URIs, many pointing to potentially disposable domains, strongly suggests a phishing or malware distribution attempt. The ML classifier also returned a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=ouya+in+2020 PDF link annotation
    • http://griesvoegwerken.nl/UserFiles/file/23443195962.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/namifagotonoloz.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/35166682642.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613952666a698---59222271192.pdfIn PDF document text
    • http://gartenmessebau.de/uploads/files/junibo.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210905133342.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/27877061629.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/gurunuzifonegikixedudifeg.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/zesezavejevuki.pdfIn PDF document text
    • https://edusfera.pl/upload/file/21055781286.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/dubifefijerudenodaleban.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/fekavosuramawozo.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139157471535---ralemefunefekizemivewo.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/fagafuravoruj.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/35721406620.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/parujuguzedipasusen.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/sabumolokumemosirovaxumaz.pdfIn PDF document text
    • http://yuli-china.ru/d/files/vibozavosik.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210905_701381DCE10B14F0.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210902142433.pdfIn PDF document text
    • http://namngonviet.com/user-/files/48383752675.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/fulatimemuxegegosabu.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/33998139546.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210902_160053.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_off0000c87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 9920 bytes
SHA-256: b78fc0f48a2239225545fe0781e472539f4484b1804bc36315445598c4aca279
font_02_sfnt_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 18776 bytes
SHA-256: 7d2c2d93fdda53c92e1d265eeecc05cd3a1faeb9235f1047325cabf1926dd5c0

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