Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb6dcd9e5659fd2…

MALICIOUS

PDF

79.4 KB Created: 2020-03-26 10:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ec60aeeb2774851d203c9e79695d65e SHA-1: 0541234e74b17a7ef01b311d5fe098630e17796c SHA-256: 6bb6dcd9e5659fd2dbb0a4c1bb9cf6575d399a20942c6fa3438dfddcae5ea750
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a URL that matches one of the embedded links, suggesting a deliberate attempt to direct users to potentially malicious websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://azurconstructionrenovation.fr/uploads/1/3/0/5/130589104/130589104.html#ejemplos+de+premisas+externas+e+internas
    • http://salonfryzjerskibella.pl/uploads/1/3/0/4/130490181/pibajobezonir-puzijevula.pdf
    • http://seafoamcottage.net/uploads/1/3/0/7/130774973/saxakubi_ronizitefaxilut.pdf
    • http://lovacollection.com/uploads/1/3/0/5/130545097/e5763e065f95f00.pdf
    • http://lechantecler.com/uploads/1/3/0/4/130490056/fd0231427ad1a.pdf
    • http://aozora-project.org/uploads/1/3/0/5/130543600/xobelizojenawur.pdf
    • http://joeytorkelson.com/uploads/1/3/0/4/130435597/zigaruv-pugatet.pdf
    • http://chapteronelc.com/uploads/1/3/0/7/130740074/f6bdbb2d2d6.pdf
    • http://lilibugsshop.com/uploads/1/3/0/6/130640179/bugedifapu.pdf
    • http://sideshowmarketing.net/uploads/1/3/0/4/130476207/kivafebidako-robabusa-bejimiwonolo.pdf
    • http://bkhouse.services/uploads/1/3/0/6/130620528/zobavakaweku.pdf
    • http://appraisestuff.com/uploads/1/3/0/5/130551927/leneba.pdf
    • http://dutchagrosystems.eu/uploads/1/3/0/7/130776223/wojalibexuna-fomamixuwakikij-xatamij.pdf
    • http://xsportsphoto.com/uploads/1/3/0/2/130288483/9f381.pdf
    • http://harthillcastle.com/uploads/1/3/0/7/130739591/dogugagovusumu.pdf
    • http://pgcinternational.net/uploads/1/3/0/2/130272496/pixurolez_mowoduv_kozawapolota_wulena.pdf
    • http://justinrossberg.com/uploads/1/3/1/0/131070656/f2045f5799a7633.pdf
    • http://riversidebuildings.com/uploads/1/3/0/6/130604493/8695755.pdf
    • http://pottypeggyscrafts.co.uk/uploads/1/3/0/5/130542953/mokexomazika-xoxages-zekupogasixela.pdf
    • http://localzaa.com/uploads/1/3/0/5/130590596/mubifuzilejig.pdf
    • http://klyamrecords.com/uploads/1/3/0/6/130605248/6480959.pdf
    • http://greensboromusicteachers.org/uploads/1/3/0/6/130621113/4108953.pdf
    • http://www.kaschnco.com.au/uploads/1/3/0/6/130620416/3598216.pdf
    • http://rodcoleman.com/uploads/1/3/0/7/130739662/3411931.pdf
    • http://ghastlymonstrosities.com/uploads/1/3/0/5/130588650/xunotuvake_gajibip_bufowe.pdf
    • http://sophialatrell.com/uploads/1/3/0/6/130603955/2156409.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de25.bin
7df88723569d4193f530fe437fb919d713328a77de93ba1b94bee14e62ba1f6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE25 1712 bytes
font_01_sfnt_off0000e601.bin
b6b2dcc8bc1019d3a74c66ba0aaeada0324db439986d65d9ab375e219d831639		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 11020 bytes
font_02_sfnt_off00010b6e.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6E 4144 bytes
font_03_sfnt_off00011864.bin
1104c88d649693a2c120d1598511aa3922a7df9b7b3df98dbf00854e2b79198b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11864 16144 bytes

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