Malicious PDF — malware analysis report

Static analysis result for SHA-256 80de97ba0fd3c801…

MALICIOUS

PDF

87.2 KB Created: 2021-07-25 04:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebda13f435ac103622084592721ab6ec SHA-1: f1b1e5e646c4a1d1e4679b913bf6da6b69432b09 SHA-256: 80de97ba0fd3c801f82bbecd60582943e0b557d7b8d53667701f870839318fc5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to lead users to harmful destinations. While no scripts were extracted, the structure and URL distribution suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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://takeacode.com/user/d41d8cd98f00b204e9800998ecf8427e/file/foloxibafexoxipufaf.pdf
    • https://dgaspcsm.ro/ckfinder/userfiles/files/nizexotubo.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/4113e24c77a05dc6e4275a1789b9ac0b/wusofodot.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/a36c4e8be7bc5660840a2d21ad468d0c/20101331698.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608da7baa6c3e---42457847261.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080d07b49ed4---lejikebiwajuxepe.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/7d1e6a0b851a6a0c310f67f88df23d39/lovowexilaku.pdf
    • https://12tiga.com/contents//files/55067486195.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/kazes.pdf
    • https://living-stone.lu/userfiles/files/61583659686.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16087d51473de2---1227669868.pdf
    • https://argumentua.com/i/file/tifalopewize.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/a12ac1d21e1a7cff400708d929d8404a/wojofejuj.pdf
    • http://ssujaxchapter.com/clients/83257/File/lipigekepolupevanuvoli.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160774019b81a7---28804198916.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee74f20c20---logefulino.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c57346a0c6a---waxafogoxej.pdf
    • http://global-insurance-broker.de/downloads/fesobixifojozogikuz.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079f837d6220---livogunixofurukafilupabe.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f53c2febd---selovitunebog.pdf
    • http://mabifitness.it/userfiles/files/30299458971.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25b965951c---dogusedofewadasut.pdf
    • http://smartcevent.com/clients/871459/File/kiwonemapusejudaxuxi.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/8184fcee21e6922109b92e2edd294a0c/wudonesibilutip.pdf
    • https://lacecinella.com/writable/public/userfiles/file/wutofimopigolosumufima.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=is+a+sand+tiger+shark+dangerous
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF28E 16792 bytes
font_01_sfnt_off00010aa5.bin
1e74a9567ab809fa2ecf806e2fe7f3a1a40d9791782e7f6ea3d8f3e704c35323
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA5 10624 bytes
font_02_sfnt_off000122a9.bin
383bdb48403770ac8d4e384de68fcca546866606ccd5282b9c93245bac393700
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A9 17084 bytes