Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e505ddd86c93def…

MALICIOUS

PDF

82.4 KB Created: 2021-06-29 07:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6975c9740a2c41613dc021c94e8ef7a2 SHA-1: 02168a42e0dd59411526c31ce991a6c9b757348f SHA-256: 1e505ddd86c93defd0d0ae1eb04031e25fc33c09a6f373ac6bdf2378949996df
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm designed for SEO manipulation, likely to distribute malicious content or phish users. The embedded JavaScript and external links suggest an attempt to redirect the user to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://inwebjor.ru/uplcv?utm_term=molecular+geometry+for+ncl3 PDF link annotation
    • http://classiccar-jp.com/js/upload/files/jisozefonizifagolapazubi.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b30c623f6---40146995535.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/0jrd7d30rvfmfdvb3fsvdn9d20/73703434351.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a802d72ad7d---nuboviba.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/f295b110ec43f758b29942c774f41fad/dubeliwasota.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/fc47302544894dcf301f7ccfc238f524/92905621039.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/gofawozesibavola.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/693fd1ff941c600e20cdcddcc8ec3fd2/11997474839.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/xasunefaxog.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/v4e6cb153lbpscojt8ekrsrmhf/foxivukupepevofobizubitu.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16091a5908e945---dosovo.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/tgobr1vqr4bl1ohcfolkrca55t/depipawo.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84ba069dc3---vewobidapopamave.pdfIn PDF document text
    • http://northcity.rs/slike/files/78016361248.pdfIn PDF document text
    • http://brlairport.com/images/file/54885810060.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/82376714df0487b4efa7cf46694396d4/xuvinoresasufokivoze.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/359ueq6nenc3io0i87brshok42/6396429338.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/82eb84fca6636226639a21733b8a1f9b/87765289015.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/lubalikuwiviwem.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/kegidiretujafame.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/aa86316a43e6adfdc08c7a4a47b4fb40/xezupotelel.pdfIn PDF document text
    • http://bronia.org/userfiles/file/xixomalejisezaxali.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae48ed45bcb---36094265196.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/1960f45e87c0c73317e4ab9cfc9421bf/34304139370.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BC 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_01_sfnt_off0000dd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9D 10796 bytes
SHA-256: 44c9def2cb5d6590ca7b83405e5280a74b3d9be5f23f2c49265ad9b0c37523d2
font_02_sfnt_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 16724 bytes
SHA-256: a6a482879e499b54f85785268ed9bebb28ce29fd651992c6979afe6f47c79fea
font_03_sfnt_off00012244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12244 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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