Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9cdecf34dd3769…

MALICIOUS

PDF

65.6 KB Created: 2021-09-16 12:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5cad86b124c38bc46eec9a4b212b03f6 SHA-1: 98a61f4617ccf11fb595692badaec92386a18a65 SHA-256: 5e9cdecf34dd3769e0cca29cea89034c8b243e38d1803e7c823f2bc324f133f7
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ClamAV detection and heuristic firings indicate this PDF is malicious, likely acting as a lure to external malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3621

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://smidgel.ru/uplcv?utm_term=tv+indonesia+streaming+apk PDF link annotation
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/qcqjarrs179qdiirls997nbvk1/rupazojiduboxawotineji.pdfIn PDF document text
    • https://mklaassen.nl/images/file/11262463867.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/24231062596.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/pogagi.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/zofol.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140d9518b666---wogarebudigewejad.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/fexojakisurami.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/99500140907.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/najitilinu.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/3eebc014fa70b29089c7303ab9cbe8b7.pdfIn PDF document text
    • http://rescue119.org/userfiles/file/91648436716.pdfIn PDF document text
    • http://rongqichem.com/upload/files/pitifesil.pdfIn PDF document text
    • https://ags-car.com/upload/files/53735464092.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/zolinijerakuda.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/85503695274.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021091610033424.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/mazujesibubufoguxofumun.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/56755838699.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/wigowogaralazik.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/28449277299.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/nefinapegadokujilep.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/xogiliduxabitepogina.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/46003349283.pdfIn 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_off0000b383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9A 10808 bytes
SHA-256: 1250e3e9a781f2e98ee3b0be5dc91d19879a07b0f970833dc69182ec01e760bf
font_02_sfnt_off0000e455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 14936 bytes
SHA-256: 2b564d4f24d445a7004bac7413e4ba89c666eed16c1da51df2a35789122a4a19

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