Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc5ef30eec07cae…

MALICIOUS

PDF

69.7 KB Created: 2021-10-02 15:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1a2de9d8d91e2cbae832ffe2ecd9a73f SHA-1: 9825b348f62b1de02b184d40fbd65a76a65a3071 SHA-256: fcc5ef30eec07cae28ae29a22c93174bce7ba1ef16497a6363fefb41eebe5bf6
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to the identified URL, which is associated with a link farm and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://inwebjor.ru/uplcv?utm_term=at+high+altitudes+the+boiling+point+of+liquid+decreases+because PDF link annotation
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369c1f1445d---nivujanamipibifuro.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/50353841329.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/xadelamitavixisaniwediw.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/mowedebinusofurusuf.pdfIn PDF document text
    • http://jobsmarttampabay.com/files/public/44256850691.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/soresuredotutiravip.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/160109309147.pdfIn PDF document text
    • https://bursaphotofest.org/uploads/files/81422187056.pdfIn PDF document text
    • https://botroul.be/uploads/kutulase.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/5916288128.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/10192009407.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/52365780077.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/93075776496.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/1fht5l0qv10gdfblfnmqe9rnlj/33320891368.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/1799356754.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/89981573944.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/62386555223.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/gilokizamo.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/gudesaxunesavinezema.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_off0000ae93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE93 11264 bytes
SHA-256: e649d24aabedaf251ea2f618211e3599e242548630099d4cbd9c9ff783a2e73f
font_01_sfnt_off0000c836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC836 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 16000 bytes
SHA-256: 6d7387d1b93e72682e80da12bb8cfc6ca2050394a9ccfca175e5610a8d297fe1

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