Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd39b0d370f4844…

MALICIOUS

PDF

84.1 KB Created: 2021-09-09 02:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f84d72d1a4614f273c2c2d257ae46ac SHA-1: 8db89b2e60ba57ce2ea73dd5a59b858d5e126ca5 SHA-256: fcd39b0d370f4844d05ae7fa776e1abe74ccf9b34bf02de5cf18bba736cde746
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely serves to redirect the user to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/u1lqb0rpo5akv40jo8phv894q4/73065604344.pdf In PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4d9a93e24ab541402f700e7bd639498f/41973973073.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/59741855327.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306f88d0b1a---kajobizidukadasa.pdfIn PDF document text
    • https://mkontakt.com/dat/file/pawasuxemuxewaruditikutu.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613419222541f---ladikanezebupobop.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/61353977398.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/sekivofada.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/rezutivowulari.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/tubale.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/kababadakamiligubexexon.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/44192212880.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/81581550031.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/161337b8c2aed5---17974791349.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/63809930635.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/72877832050.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/16926252871.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/rixaz.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/megalejorazilixixixoruwa.pdfIn PDF document text
    • http://secretinvitation.net/images/files/suwukamesaxejagi.pdfIn PDF document text
    • http://jianianhuayule.a9188.com/upload_files/art_files/files/20210904_041352.pdfIn PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/lepatidujebana.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/6mbfcjhc31vonq53s6ophvj7gj/gopokaxinuvepavaduzowo.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/35515798130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=friends+season+1+full+episodes+online+freePDF 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_off0000e226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE226 18396 bytes
SHA-256: 9957970df382e493c8c16831bce2861a6b701f80024f2c1455ed4a690b7cd541
font_01_sfnt_off000112b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACC 10524 bytes
SHA-256: dfea0d7c4297e68d552e0a5fadbd0a1986d4c24e7309bdecbce21284332c6647

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