Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb47aae812a065e5…

MALICIOUS

PDF

82.7 KB Created: 2021-09-19 03:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 607ecaddd4c2fb5e93878f86c148ba88 SHA-1: aa6d8741cf47b5c810e9da1d73b0f02af4d48780 SHA-256: eb47aae812a065e5d5793f661605f1816198707f139bc9894c8333081820b393
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with many pointing to disposable domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple unknown URLs on disposable hosting supports the attack pattern of directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • 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 http://machinesupplier.cn/data/product/file/2021918_114759_252.pdf In PDF document text
    • http://sciattella.net/images/file/mixofapiwuwixufugu.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/62628565312.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/lusifolem.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/20354905188.pdfIn PDF document text
    • http://fitviewer.info/files/file/83773157435.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/taxovoj.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/lawerozafipodifi.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16144125c31926---1358164742.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/95268903562.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/niguruxi.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/15164794763.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/padowikuzuwe.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/japobaxaj.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/33541390610.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/35809146752.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/jodazomo.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/54260209040.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/limofelufapifuje.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/bikarazenivu.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/50593900130.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9fb943904---rosigaxozebemodevotep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=steps+app+androidPDF link annotation
    • 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_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 10412 bytes
SHA-256: 8cd991ab0d007246311f68021ed5bd7c1c718640cd9d5aae59b06b166c726f7d
font_01_sfnt_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 17672 bytes
SHA-256: 2828f50bcb3f412167613185e32fb5cc08c247ecc6f107b803108d2701b50509
font_02_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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