Malicious PDF — malware analysis report

Static analysis result for SHA-256 9077225d67eedd05…

MALICIOUS

PDF

89.5 KB Created: 2021-08-01 02:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bca2c6dfd7b53885a0c412dace57d914 SHA-1: 8aef89d7bd5b1bd49877f350cad67b0fdc500721 SHA-256: 9077225d67eedd05b100586538a268e06c8d92342f2488589b7ccd445ab8f174
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=how+to+install+popcorn+time+on+android PDF link annotation
    • http://botosani.ro/img/uploads/file/5716688352.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/06c8726229a7d038d0231f6b28162859/64497388441.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/7fcb8551f81b133d42f44f14c849e872/fepidoj.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16105c5088b603---90299733625.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/e1sqgrgbjmoc4p7asr2p25omsm/worujemivanunemasiwaju.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/31375762108.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/japuledexavike.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b57fa4ef049---74581422933.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/nuwuterugukemarebojo.pdfIn PDF document text
    • http://hnysft.com/d/files/45248110425.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/wuneremusiwibeg.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/42186237980.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/7196713016.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/61718595085.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/tazegexog.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/32302600252.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/tigutibifatonam.pdfIn PDF document text
    • https://x-software.cz/data/file/firoroxufalugoruf.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b40f072ed9b---dafelisuxebavo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f04a82adf96aea49970521d37201153a/90972273031.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160947613ed440---10507098409.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095feacd622e---46637013795.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/35871669425.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/terateraxixodunudoso.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 17504 bytes
SHA-256: 3fa86f6a0040658eb2e68c08251cd07cb73e34eeb5ccf8db496658f61330ba53
font_01_sfnt_off000126fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FC 10752 bytes
SHA-256: 733755eacc98eff54dd5f8a7df26ba2761def56c521849acd2a53381ce176898
font_02_sfnt_off00013fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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