Malicious PDF — malware analysis report

Static analysis result for SHA-256 01494fba7fd1abbc…

MALICIOUS

PDF

85.8 KB Created: 2021-09-19 13:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3194a2e278d493f0b1c805eddf798102 SHA-1: 6db86fa89cb57826e2cb6236b7e1e0ec8273297c SHA-256: 01494fba7fd1abbcecd221e6f074ec80afbdc46173f59d524bd7b13c8962611c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, suggesting a phishing or credential harvesting campaign. The PDF structure and the presence of external links are consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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
  • 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://ketchas.ru/uplcv?utm_term=megapolis+cheats+2020 PDF link annotation
    • https://arerp.kr/data/file///sidinuxuka.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/kevewavimikotegebiweto.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/fasesevuxuroniroseg.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/51941854007.pdfIn PDF document text
    • http://373113.linker.tw/files/rugevef.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210913192426.pdfIn PDF document text
    • http://www.ntweac.edu.hk/admin/ckfinder/userfiles/files/85573227353.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/latizulopofafavezivivep.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/nitevigisejubusixi.pdfIn PDF document text
    • http://www.520amis.com/upload/files/givibuzizugisopexa.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/18043577490.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/52868674359.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/98188731505.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/pogolotelofazonig.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/pafilejazukotet.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/42036850019.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/42508568147.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210914061232.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/190aa78fea450999259d95285bb02b7c/47836264749.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/sesinuju.pdfIn PDF document text
    • http://teakdeck.pl/files/file/nutemumepodowudo.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/damoxojerunukun.pdfIn PDF document text
    • http://paraleumarian.ro/app/webroot/files/userfiles/files/xirixevokurijepatopebikas.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///93367708330.pdfIn PDF document text
    • http://domosplast.hu/files/file/monofikatulasubavusowo.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_off0000e998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE998 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 18400 bytes
SHA-256: 2936e5c581a14757560e070b7d750b5a8df6c06b8b17a95cec7855b133bae809
font_02_sfnt_off00013153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13153 10684 bytes
SHA-256: 94e777a5a72d0fbb17148880feb4245aca93b789f117f9d42f4769634a325d8a