Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68f9b02dc6bfda7…

MALICIOUS

PDF

88.0 KB Created: 2021-09-09 23:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 79701f5145d3d6029d6e220638707486 SHA-1: 9b319d9ca9d542024e14136bdf26838404f25c94 SHA-256: a68f9b02dc6bfda75276273273d4ddca447f6d718514fd85ca5a67ad2689412a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs, many of which are structured as link farms pointing to other PDF files, suggesting a phishing or malware distribution scheme. The presence of 'utm_term=asphalt+8+money+apk' in one URL indicates a lure to trick users into downloading fake applications. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://pixomot.ru/uplcv?utm_term=asphalt+8+money+apk PDF link annotation
    • http://secretlove.ch/ckfinder/userfiles/files/sabotuxanowij.pdfIn PDF document text
    • http://ovstav.cz/app/webroot/files/files/9042991343.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/34611811560.pdfIn PDF document text
    • http://colegiumaniucarei.ro/ckfinder/userfiles/files/gojixewosum.pdfIn PDF document text
    • http://cbstav.cz/file/24536116190.pdfIn PDF document text
    • https://cooperadora.grupocreartel.com/documentos/archivos/2292073247.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/52236133667.pdfIn PDF document text
    • http://kotrackusa.com/fckedit_file/file///20210902_8_55_58.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/67552809158.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/31103646.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/uf6crn1vvsa63chm6erh489t64/44981751071.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613933511cb93---dizunedewasasadizokebib.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/danin.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/16297342574.pdfIn PDF document text
    • https://faceless.me/userfiles/files/80287514945.pdfIn PDF document text
    • http://drumlockingclamp.com/FCK_Editor_Images/files/zikinunak.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/17864384499.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/mejofiwaziduxanunavive.pdfIn PDF document text
    • http://shahgrp.com/uploads/26013811442.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210905150921.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/negojobidugixo.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/xekuwuzisapedoxul.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/tijazipusudidebebejiv.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/budaf.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_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001095f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 18624 bytes
SHA-256: bc67b403ff58bb240ef956c821fa918d572147fb6dbc87d6a86e088b823d93de
font_02_sfnt_off000139d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D2 10720 bytes
SHA-256: 090a404c358994ca085d714073f67d5542ad1276036e2385d4124037f977ccd1

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