Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f991d60cb5e365c…

MALICIOUS

PDF

110.8 KB Created: 2021-07-19 22:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 375255b73c38f239d6ba5ca3acad5caf SHA-1: 0c4b102b78d4ec9ec1334ce96ca2b4a5272c10c7 SHA-256: 9f991d60cb5e365c9e970e9d348f6aed11719e1e32712634990b79a48f325de1
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous links on disposable hosting and compromised CMS upload storage indicates a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/9k7submgop62paum81t2rivb76/14526074034.pdf In PDF document text
    • https://acryl-bg.com/userfiles/file/sadisododare.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/62155164128.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/4b0899d873607aca96fd671d7550e416/zoreted.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/meruliz.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b57c15f18cf---rararazor.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/zelaladexezunofizoji.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/gegenepapogalopikejogusug.pdfIn PDF document text
    • http://dges.in/userfiles/file/xuzebasu.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/6flis5havv83h02gi7nbjtsbf2/33560831342.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/ofdjc1r03a1kfdv90rrhm538eu/77322771858.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092deb7cd5a4---57009134935.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7121948b4---31262416219.pdfIn PDF document text
    • https://szaktel.hu/uploads/file/28098092742.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/f39ues6i45j5sg5qkne8ad3liq/17206873617.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/zojotisowusitexujuj.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/7017460868.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/faponamade.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094209f188d6---42858258639.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-16/20210516012514282618.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c10b1e1511---ruzogowibiwuramoxuf.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/lv1o9esffiqj9d0io3kpjtsjp3/boxinolodika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=plato+western+political+thoughtPDF 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

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_off00014e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E44 18600 bytes
SHA-256: 8d2f61bb7563148c3c336a9b9187098cf2b3776c0151208d648f43237ddf4019
font_01_sfnt_off00017ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000194e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194E4 10840 bytes
SHA-256: db40926878ac91af33c3248599337d4c42813810c0d0eff9592d9b74c90c3cc1

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