Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82491279b45b67e…

MALICIOUS

PDF

84.3 KB Created: 2021-08-21 15:48:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a1d48ea56754213d2627f9afda2c16d SHA-1: 90cfe0a1f4757470c1b2e8a6b267f234139d3963 SHA-256: e82491279b45b67e152b0679857847966df23374934e6d3eddf1936c0ebf2e27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and embedded URLs are consistent with a phishing lure, likely attempting to trick users into visiting a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://medvor.ru/uplcv?utm_term=how+do+i+turn+on+my+logitech+webcam+microphone PDF link annotation
    • http://elijasprojekts.lv/files/file/34041380393.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c26e045eacc---fimiwi.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b96d2722a18---bekopi.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c98952a55a4---58624976798.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0c78e17d---80294980674.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/890725dc26d6aad96000dd8e0d48d0d8/fedoxitubupopubodokin.pdfIn PDF document text
    • http://aven.su/userfiles/file/57054175679.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/10290406d3a855ca3097f54d1e57a4ea/mipuseli.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608219cb3d214---97976488132.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/3ridkpd5eisdtne9g6k543vc00/kejopalisaziwiluli.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/30169084454.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/20908866567.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ffcfa19bfd7---zedepakigamuxikipid.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03d2eb673f---52267637579.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210720_122655.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/dinumewi.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610782eca364d---zofaxaxaxapepu.pdfIn PDF document text
    • https://tadimtursu.com/image/files/webamotowovopimigilulefuk.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/buxapibu.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/f5510bfff28cf4fb971fb78fbdc022eb/89738526051.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a285c75988a---80444607580.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098c0e66b292---64288521857.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_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 11224 bytes
SHA-256: 007f49f1c4ea9d564db4fa7ff462f7c85346d8a7a24e5c9f3462fec1294161bf
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11844 16812 bytes
SHA-256: aa959f6ff3bc28153cfbd3ecdad61fc2fb85d37b90d9b1e29819134f778894b5

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