Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a063a7dcf80ed4…

MALICIOUS

PDF

90.0 KB Created: 2021-09-05 17:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 759049c3f08ad21df9af27afc09ab4a5 SHA-1: 6aadf86b3b38f5c0ad9eb3d551b51487f2d943d3 SHA-256: 26a063a7dcf80ed4833c8c4e33ef9504d0dd23b36f9eb32d99e87dc993eac405
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The PDF also functions as a link farm, pointing to numerous external URLs hosted on various domains, many of which appear to be compromised or disposable. This suggests an attempt to distribute malicious content or conduct phishing by luring users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ivepe-elearning.gr/assets/UserFiles/mainHome/file/12865343714.pdf In PDF document text
    • https://grancom.by/upload/docs/madewimadorovokupoz.pdfIn PDF document text
    • https://0900107678.com/upload/file/zenirat.pdfIn PDF document text
    • http://change4best.ru/upload/file/69127739511.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/20940983942.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8e8362cf30989c1e380ee6a067648d6e/61486998389.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/210d95ed5a0f9c8e61bcdd292c34ff05/71545578588.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/hkqo256knur29glc5ko9ts2bu4/97139119750.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/16e7526306bb276dafbd008c71c8e22e/65006741232.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/20408140304.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/p50rmd6rvk6i4mcece4ldurci4/wakasafudefezowefo.pdfIn PDF document text
    • http://cutskytools.com/d/files/kujizedudez.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/wovugufakusifenobatur.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae5ac8168e---jijujumivufunu.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607279acb1d32---wenepajivobifovufomanef.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f62d3795905---zemadubiji.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86ee08c191---38394163914.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/basoduwetif.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/18cbfbe2823748db34b61246b7c7c109/jinoboxusosi.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/gotuwajobejipib.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/77929242782.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/88418853718.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/zesewujexazap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bosch+800+plus+series+dishwasher+service+manual+pdfPDF 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_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 11424 bytes
SHA-256: 1dcf9fc2f0d6fe262d1044e83911706a8a864b127be9c8304c3de45238700682
font_01_sfnt_off0001116b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116B 18468 bytes
SHA-256: 35028b29455eebb9c31b2dc6d47d49680cee4694744dd2096fe0483ec3e34d5c
font_02_sfnt_off00014184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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