Malicious PDF — malware analysis report

Static analysis result for SHA-256 1090e07510978912…

MALICIOUS

PDF

78.2 KB Created: 2021-09-11 10:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c153cf6d301bdbd599392c807583bf22 SHA-1: a1f59f66859abaa794400c9cb35d160b8d39b00f SHA-256: 1090e0751097891220fe9804d9ec838cc05118ec0fb8164afa3fadbcbcf4af61
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs pointing to various domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution vector, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://laborke.ru/uplcv?utm_term=mlbb+vip+mod+apk PDF link annotation
    • https://jahanchart.ir/data/files/file/segakemobinugin.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161395f5b75852---14319977668.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/66633861406.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/sasojolewuderesuzo.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/87755139863.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/bezagake.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210904162026.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/fonesuzenumonurewinekebe.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/85997244450.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/jexalixavo.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/newobininamemupide.pdfIn PDF document text
    • http://honderhotel.com/UploadFiles/FCKeditor/20210905230330.pdfIn PDF document text
    • http://vit-physio.de/file/ditisepa.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210908140731.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/jubegux.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/daxelexerudijivawokemopi.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/22785583658.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/tuvubezefud.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/wejovebuvovimazesodunezeb.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/gukomovudelunedabir.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/tezifaje.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/guxafuripe.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/li058uokjbgklsl3j2ui54k2e6/bezinafufu.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_off0000cd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 18156 bytes
SHA-256: f5666826fb5eaf98bb9ccf9f2e3830d8faa37336ba10dbb9da6c3025906ef2af
font_02_sfnt_off000114b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B2 10240 bytes
SHA-256: f3ebe09429132908679afd3725afdd218f9c8038cb812066585f110790ceaadb

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