Malicious PDF — malware analysis report

Static analysis result for SHA-256 530254810fc8f687…

MALICIOUS

PDF

70.6 KB Created: 2021-09-01 06:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d054a77db09678405b46acec03a8182e SHA-1: eee3ab8644201986af24c307556c386cdfc5b2c0 SHA-256: 530254810fc8f68761fc4e41b9a94f79b50e32d826fe9b4f4aa266bac8e3ac13
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://jikaramen.com/uploads/files/87691603518.pdf In PDF document text
    • http://studiotecnicopinto.it/userfiles/files/pakurizilupidufozut.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210801_F5958F8096F21F04.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611566ca464ee---43378595730.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/tnp8aj7tkf8ge4lb521gosccf3/zapawaraponexon.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/bifewodujeditowulisokavab.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d17bc15fe---wemowovodogitexuvu.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/i1lgrli4ql380skmrnu7e55jk6/batuvipawawegibumi.pdfIn PDF document text
    • https://miet.hu/kepek/busefifebetaw.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/36488515304.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/68198968532.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d5b19c52a---tatekigoboropidotunu.pdfIn PDF document text
    • https://kimcert.org/E/file/bukasupab.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/12010777160.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/60868086590.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/420d96e8473c73e5076215b1b3f85600/kuxilawixeluxis.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/2f2db5ada5fe319997e90209aed26192/gelaxusopunuvof.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cee56cd4d4a---20735888623.pdfIn PDF document text
    • http://heichapuzi.com/uploadfile/file/kopakutabovipitigilux.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/79126769678.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/zelimafiduraxopo.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/11207307066.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/23016908239.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/vitevu.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/24322778113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+any+name+on+fortnitePDF link annotation
    • 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_off0000b6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FD 10532 bytes
SHA-256: 4d000ff60fdb173d5c8551cdadf067c0d22c52cf3c9fd9deaac4be9163442812
font_01_sfnt_off0000cefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFC 15092 bytes
SHA-256: c2cc06ac83ae811bf4b66a9c61629ddbf73fe0308c337a46eb8615673af72136
font_02_sfnt_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1