Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac14d72b75b14bce…

MALICIOUS

PDF

79.8 KB Created: 2021-09-01 21:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6077fc63e770e7fa761577e1333fc5ce SHA-1: ca5e40c850292be671c5026787973b1d41242808 SHA-256: ac14d72b75b14bceb8994919ed6013c3b4eb97fc6314122b85818ee59084435e
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=twilight+parts+all PDF link annotation
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b938417490---gofunalifitajomogutosipu.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160708e758a0b6---natunidufelufopo.pdfIn PDF document text
    • http://tainanrup.longi.tw/uploadfiles/files/20210823_193759_9478.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/03691eef58fb4f9bc8e8d74704cf4b3a/46835237230.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210725104120_20831052.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/89384023739.pdfIn PDF document text
    • http://aquatherm-graz.at/files/52594671269.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/sowupatavabevupavowuze.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/lojatumezotupedenosa.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/faravaxexowumixekezivafo.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/ribaguwubulogamez.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1f124a97a8c890deea18373a05dcaf37/zaliguxemitilux.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/25615479316.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/nejolevijumikito.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16087b05e59523---wezeradid.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/kevexijepib.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/rusomeji.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/7eoefau41m3me4bdjfnnet39mj/vowaxafomuze.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89274214b8---70129173723.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/aone9otetv9vogoua3njd5vml8/48725581550.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/619c7257cdb513f0ecbb135fb4b24f01/47480558083.pdfIn PDF document text
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/14683044564.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_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 10224 bytes
SHA-256: dda27cd39e6c09a9fc9a980c148a4b7c90059e2cc088bb1b6abc7fb9e066e0f2
font_02_sfnt_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 16288 bytes
SHA-256: 60610aae006881a3abd2ee0aa511d536cff06e7154c6033f01786060b726f057

Open this report in the interactive analyzer, or submit your own file for analysis.