Malicious PDF — malware analysis report

Static analysis result for SHA-256 0119193da29f0894…

MALICIOUS

PDF

182.4 KB Created: 2021-07-05 10:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 815dec30b06a25399ead9ca3ef2763a8 SHA-1: af8882a3794e1421f1116d19f434d53ca13a2de7 SHA-256: 0119193da29f0894f2938d2416705bfdd6ae75d258d37fc2dce0d0970d67e5e4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9031

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://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6663d8b098cc5810419c2bd555cb2d75/86512306971.pdf In PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d0b8a7369---86645453170.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/27162839792.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/31035146079.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/35c30b14d0bbae49f613f4fe07bbf654/66463776358.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16072d1634c436---53021791939.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/zonuf.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/1592250234.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/dixumunijolinejavi.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/gukigije.pdfIn PDF document text
    • http://soupworld.de/upload/file/nadunegurudux.pdfIn PDF document text
    • http://shophouse.info/images/files/gotomilepidetizusubez.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/1623515072davazoxanosajibalow.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/sijugade.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/29865617741.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/49429298937.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f945018973---fokomoraresobuzizori.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/sitom.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca14d0fa16---73203494126.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96de3a8218---kivuwegepatodos.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/jufumigexi.pdfIn PDF document text
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/fubobanuvonoweme.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7a6083b95---23024615275.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/kusele.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/jukitaga.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d80cae701---futirudogudojin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rarefaction+definition+sciencePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24710 10420 bytes
SHA-256: 94baee0e6953247fba6f55c856983e079e676786275114a74db11d6de8894f34
font_01_sfnt_off0002679d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2679D 20216 bytes
SHA-256: 6e4d4bf78010ae001d37851c984a7d2862b40050959f05fd9076513805349b1a
font_02_sfnt_off00029af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29AF7 10468 bytes
SHA-256: f65fd0d6311817d7a5a4380d6a0c92e509b8f7d0b0a241d3f24b94f009e5d7b8
font_03_sfnt_off0002b2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B2E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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