Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0478c3b72ff3dd…

MALICIOUS

PDF

76.8 KB Created: 2021-09-09 10:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d32010236c543b430830da0fdc86cd17 SHA-1: 76ddd8e8ad84e8e8fdbe25c6d07e750c598945a6 SHA-256: ff0478c3b72ff3ddbc42d14d05112b5a2c1524bf5b2aeec73749817b0a8339f0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many hosted on disposable domains, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is a phishing or malware distribution vehicle. The embedded JavaScript likely facilitates the redirection or payload delivery to the external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=how+to+get+iphone+contacts+to+android PDF link annotation
    • http://eminenceinc.com/userfiles/file/36343364914.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/xijuxogefelafil.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/66726459018.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/xatosuduba.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/62238398746.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/39548981371.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/32954451012.pdfIn PDF document text
    • https://sistemagestiondpr.co/userfiles/file/1695150532.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79338965495.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/jopemutepalojufozugalez.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/1677072574.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/favawelevifelutew.pdfIn PDF document text
    • https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/76451172518.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/2896108162.pdfIn PDF document text
    • http://fourfoods.com/images/files/fefidobebek.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/mokigupugimitobaladas.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/kopuxogojagepowivizuruzob.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/4285498251.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/zimigagunilaj.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356fae94a62---xarudefif.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/tifuwoninif.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/zodipagojolozemope.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/59883701742.pdfIn PDF document text
    • http://belv.ru/userfiles/file/latiju.pdfIn PDF document text
    • https://istanajp2.com/contents/files/sugamajezaz.pdfIn PDF document text
    • http://freewest.at/muwegodepebotobazikuwot.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_off0000c7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 10824 bytes
SHA-256: f8bd51b76365957c39a3adb161633c6fc0727f7a90da9adee98e176b06545f1e
font_02_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 17524 bytes
SHA-256: 408af1e73915e52b7385198c7fa2f29d3e3d2abe1a24261919c9b19542605c71