Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2995304f53b8510…

MALICIOUS

PDF

89.1 KB Created: 2021-09-16 02:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5b0a0ad648f26564f355f5193d46182a SHA-1: 77756b7b1def70f45409a703df2a5b09b5f3d2dc SHA-256: f2995304f53b8510f609c2b19bb3e6d518b0c8de1ccd10d28ced45c9619b0d65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The presence of a URL with 'gta+5+obb+highly+compressed' in the UTM term indicates a lure to download a game, likely a phishing or malware distribution tactic. No scripts were extracted, but the overall structure and URL patterns point to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://coretry.ru/uplcv?utm_term=gta+5+obb+highly+compressed PDF link annotation
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/19002196871.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613b79f6a92a4---88117896349.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/18698277515.pdfIn PDF document text
    • https://merlak.ru/userfiles/file/23889365433.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/mejoti.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134ba430d061---xopejazizegepugogeluxupa.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139d483cd21b---lerozo.pdfIn PDF document text
    • http://tochuchoinghi.org/files/95322942022.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/zaradokexenonamikuxad.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/76275901950.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/28576108933.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/8945849868.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/ef2gkn3s9vn7lghg5g0vreqe4f/49806887999.pdfIn PDF document text
    • http://iscelenie.info/files/file/46960976505.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/61790886584.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/88657279230.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/36999022293.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/tanodezejilam.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/jobojizinupu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/85798fb893582ff02a244d655f1dcec8/99187374327.pdfIn PDF document text
    • https://pr-dienst.ch/file/53967410800.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6af797ba6---farijezixogi.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/44728416669.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/73020479408.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC72 17560 bytes
SHA-256: 738ccc2a9d1e71cd880153cf1375ad68fbb7263eac722d648ed5ac1cfffbd180
font_01_sfnt_off00010a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A29 17432 bytes
SHA-256: f50f458ab679ae87284670b19349462b17c4d9ac20e40dff5fe746068ae7415b
font_02_sfnt_off000123e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E5 11284 bytes
SHA-256: 3d81e30ded9cfbbf23c528968562494bec1977bc45a64008c46f3972688332c3
font_03_sfnt_off00013e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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