Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c7ca863cc9defc…

MALICIOUS

PDF

64.0 KB Created: 2021-09-20 10:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e63c4d7b207e4f1976e0bcca84608b50 SHA-1: 3871d60c28f4b84e5196c327d974695e111790b6 SHA-256: e4c7ca863cc9defc114ad4921feb2be3ce44c2bc80690107cd055bc9de47cd41
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript and a significant number of external URIs, many of which point to disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript further supports the malicious intent, likely to execute further malicious actions or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7155

Heuristics 5

  • 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
  • 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 http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c05483e6ff---71232327836.pdf In PDF document text
    • https://sharjahcements.com/images/bulk_images/files/rerapiloxenaxu.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/87532928830.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/lowemuf.pdfIn PDF document text
    • http://unsersohn.com/images/file/47924091960.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/68569164785.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/37b43e63de2423bf4b8e017e3fc435c5/xumurorivejironefoxusuni.pdfIn PDF document text
    • http://showdoimovel.com/files/files/lepemuko.pdfIn PDF document text
    • http://usmleworkout.com/files/file/rafipebuv.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/35949122119.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/14370162393.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/gutufimaborivapesuz.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/rafedud.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/xegovuzitagovidizevelis.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/10139095642.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/wosepowex.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/35077392798.pdfIn PDF document text
    • http://aquatherm-graz.at/files/kepevovaxupifutem.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/zajanifadudino.pdfIn PDF document text
    • http://quesnelfoundation.ca/userfiles/file/dijiluxitadodami.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/20/34404795734.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/labojifafukikujis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=game+killer+apk+downloadPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/23471097550.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD060 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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