Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8eb7ea28b389bc…

MALICIOUS

PDF

72.0 KB Created: 2021-09-21 23:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bacd6a5891ad13ce4be6560d9adf56e3 SHA-1: f5f4bdaff12e31a98c56399eb9026e9291065e00 SHA-256: be8eb7ea28b389bce72bc9aea9686cc28202702c22e714546ce6d8bb8093c58a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of 'utm_term=password+lock+app+android' in one URL suggests a lure related to mobile security or account access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=password+lock+app+android PDF link annotation
    • http://feriaalainversa.com/uploaded/files/77795056245.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/dokupizasuxegibakefasufim.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/dodowit.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/dosubepewonolejum.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/60712975096.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/91494490017.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/10732247980.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/27389810633.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161470df7c3792---85857831772.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8e6e01401---vutule.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/vamujatij.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/mekuwoga.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/tabupopifuwijizodudasuf.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/63653568700.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/xigibupumizakosodi.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/86150846561.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/danogak.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/19487325806.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/zegejet.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/4996a6bd9541bf0521323a8c975be62b/belogatibasorigixofinawe.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/xanutaxezata.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/17264223288.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142baad04a00---jawinaroweni.pdfIn PDF document text
    • https://motecx.com/images/file/kewebakamefevi.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/xovefifogofotunekavu.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_off0000b90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 10456 bytes
SHA-256: 330e11fbef7a7563bf8dea13fefff2881fa70d9b07e8ff724fc2acfbc2048aa9
font_02_sfnt_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 16308 bytes
SHA-256: 01844b916a8dcfb2623c240ea85c056908615d984b3f7432a87706407e3beab8

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