Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed30d9d16d2fc30b…

MALICIOUS

PDF

84.8 KB Created: 2021-09-10 00:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7acfd1eec4998b16150305f487534ddb SHA-1: a9d8fbb014c8be70d4abce59478d052a4185aabb SHA-256: ed30d9d16d2fc30b2e19f5f7add119aec12f7b3d73da0faa08302691072d8372
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing an embedded JavaScript stream, which is a common technique for delivering malicious payloads. The PDF also contains a large number of external links, many of which point to disposable domains, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness, supporting the assessment that this file is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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 http://sinocelltech.com/filespath/files/20210905185454.pdf In PDF document text
    • http://orderbestwings.com/uploads/files/59188967571.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/sorurixumimoweriwi.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109060223514879.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/safaguwo.pdfIn PDF document text
    • https://mashtalkandil.com/userfiles/file/lujofeka.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e29cd6b952b0ab80de2c55fb4871bf82/75998763030.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/rarinule.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/gogumonugo.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/tafutikirudun.pdfIn PDF document text
    • https://seikai.jp/free_images/files/gevexevotise.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/xofasobetosima.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/nijosumarivijalu.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/46984628273.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/mijajemevepazowejukeliwij.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/1653230585.pdfIn PDF document text
    • https://healthtecindia.com/userfiles/file/21716980746.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210902201100.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/runikifovaroxafat.pdfIn PDF document text
    • http://yuli-china.ru/d/files/gezejozobaditerexopa.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7735c653c---17904656948.pdfIn PDF document text
    • http://njchemland.com/upload/files/48025569074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=cyanogen+android+appsPDF 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_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 18056 bytes
SHA-256: 010ab80c89b9d2f81fb225132c79c52ac118ba9b4ffcc9fa460822b1dbca5173
font_02_sfnt_off00012de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE9 10568 bytes
SHA-256: cde5d6e16f55681b53e4e006bf9c591bc5c67751304ea99cb4ad2624194dbbfb

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